SIXTH AMENDED AND RESTATED AGREEMENT OF LIMITED PARTNERSHIP OF DIGITAL REALTY TRUST, L.P.

Exhibit 10.2

SIXTH AMENDED AND RESTATED

AGREEMENT OF LIMITED PARTNERSHIP

OF

DIGITAL REALTY TRUST, L.P.

TABLE OF CONTENTS

i

ii

iii

iv

SIXTH AMENDED AND RESTATED

AGREEMENT OF LIMITED PARTNERSHIP

OF

DIGITAL REALTY TRUST, L.P.

THIS SIXTH AMENDED AND RESTATED AGREEMENT OF LIMITED PARTNERSHIP of Digital Realty Trust, L.P., dated as of November 7, 2007, is entered into by and among Digital Realty Trust, Inc., a Maryland corporation (the “ Company ”), as the General Partner and the Persons whose names are set forth on Exhibit A attached hereto, as the Limited Partners, together with any other Persons who become Partners in the Partnership as provided herein.

WHEREAS, the General Partner and the Limited Partners have entered into that certain Fifth Amended and Restated Agreement of Limited Partnership of Digital Realty Trust, L.P., dated as of April 10, 2007 (the “ Fifth Amended and Restated Partnership Agreement ”);

WHEREAS, pursuant to Section 7.3C(4), the Fifth Amended and Restated Partnership Agreement may be amended by the General Partner to reflect a change that is of an inconsequential nature and does not adversely affect the Limited Partners in any material respect, or to cure any ambiguity, correct or supplement any provision in this Agreement not inconsistent with law or with other provisions, or make other changes with respect to matters arising under this Agreement that will not be inconsistent with law or the provisions of this Agreement; and

WHEREAS, the General Partner and the Partnership believe it is desirable and in the best interest of the Partnership to amend and restate the Fifth Amended and Restated Partnership Agreement as set forth herein.

NOW, THEREFORE, pursuant to Sections 2.4 and 7.3C(4) of the Fifth Amended and Restated Partnership Agreement, the General Partner, on its own behalf and as attorney-in-fact for the Limited Partners, hereby amends and restates the Fifth Amended and Restated Partnership Agreement as follows:

ARTICLE 1.

DEFINED TERMS

Section 1.1 Definitions .

The following definitions shall be for all purposes, unless otherwise clearly indicated to the contrary, applied to the terms used in this Agreement.

“ Act ” means the Maryland Revised Uniform Limited Partnership Act, as it may be amended from time to time, and any successor to such statute.

“ Additional Funds ” shall have the meaning set forth in Section 4.3.A .

“ Additional Limited Partner ” means a Person admitted to the Partnership as a Limited Partner pursuant to Section 12.2 and who is shown as such on the books and records of the Partnership.

“ Adjusted Capital Account Deficit ” means, with respect to any Partner, the deficit balance, if any, in such Partner’s Capital Account as of the end of the relevant fiscal year, after giving effect to the following adjustments:

The foregoing definition of Adjusted Capital Account Deficit is intended to comply with the provisions of Regulations Section 1.704-1(b)(2)(ii)(d) and shall be interpreted consistently therewith. A positive balance in a Partner’s Capital Account, after giving effect to the adjustments described above in clauses (i) and (ii), is referred to in this Agreement as an “Adjusted Capital Account Balance.”

“ Adjustment Date ” means, with respect to any Capital Contribution, the close of business on the Business Day last preceding the date of the Capital Contribution, provided , that if such Capital Contribution is being made by the General Partner in respect of the proceeds from the issuance of REIT Shares (or the issuance of the General Partner’s securities exercisable for, convertible into or exchangeable for REIT Shares), then the Adjustment Date shall be as of the close of business on the Business Day last preceding the date of the issuance of such securities.

“ Adjustment Event ” shall have the meaning set forth in Section 4.5.A .

“ Affiliate ” means, with respect to any Person, any Person directly or indirectly controlling, controlled by or under common control with such Person. Control of any Person means the power to direct the management and policies of such Person, directly or indirectly, whether through the ownership of voting securities, by contract or otherwise, and the terms “controlling” and “controlled” have meanings correlative to the foregoing.

“ Agreed Value ” means (i) in the case of any Contributed Property set forth in Exhibit A and as of the time of its contribution to the Partnership, the Agreed Value of such property as set forth in Exhibit A ; (ii) in the case of any Contributed Property not set forth in Exhibit A and as of the time of its contribution to the Partnership, the fair market value of such property or other consideration as determined by the General Partner, reduced by any liabilities either assumed by the Partnership upon such contribution or to which such property is subject when contributed; and (iii) in the case of any property distributed to a Partner by the Partnership, the fair market value of such property as determined by the General Partner at the time such property is distributed, reduced by any liabilities either assumed by such Partner upon such distribution or to which such property is subject at the time of the distribution as determined under Section 752 of the Code and the Regulations thereunder.

“ Agreement ” means this Sixth Amended and Restated Agreement of Limited Partnership, as it may be amended, modified, supplemented or restated from time to time.

2

“ Appraisal ” means with respect to any assets, the opinion of an independent third party experienced in the valuation of similar assets, selected by the General Partner in good faith; such opinion may be in the form of an opinion by such independent third party that the value for such property or asset as set by the General Partner is fair, from a financial point of view, to the Partnership.

“ Assignee ” means a Person to whom one or more Common-Equivalent Units have been transferred in a manner permitted under this Agreement, but who has not become a Substituted Limited Partner, and who has the rights set forth in Section 11.5 .

“ Available Cash ” means, with respect to any period for which such calculation is being made,

(i) the sum of:

a. the Partnership’s Net Income or Net Loss (as the case may be) for such period,

b. Depreciation and all other noncash charges deducted in determining Net Income or Net Loss for such period,

c. the amount of any reduction in reserves of the Partnership referred to in clause (ii)(f) below (including, without limitation, reductions resulting because the General Partner determines such amounts are no longer necessary),

d. the excess of the net proceeds from the sale, exchange, disposition, or refinancing of Partnership property for such period over the gain (or loss, as the case may be) recognized from any such sale, exchange, disposition, or refinancing during such period (excluding any sale or other disposition of all or substantially all of the assets of the Partnership or a related series of transactions that, taken together, result in the sale or other disposition of all or substantially all of the assets of the Partnership), and

e. all other cash received by the Partnership for such period that was not included in determining Net Income or Net Loss for such period;

(ii) less the sum of:

a. all principal debt payments made during such period by the Partnership,

b. capital expenditures made by the Partnership during such period,

c. investments in any entity (including loans made thereto) to the extent that such investments are not otherwise described in clauses (ii)(a) or (b),

d. all other expenditures and payments not deducted in determining Net Income or Net Loss for such period,

3

e. any amount included in determining Net Income or Net Loss for such period that was not received by the Partnership during such period,

f. the amount of any increase in reserves established during such period which the General Partner determines are necessary or appropriate in its sole and absolute discretion,

g. the amount of any working capital accounts and other cash or similar balances which the General Partner determines to be necessary or appropriate in its sole and absolute discretion, and

h. any amount paid in redemption of any Limited Partner Interest or Partnership Units, including any Cash Amount paid.

Notwithstanding the foregoing, Available Cash shall not include any cash received or reductions in reserves, or take into account any disbursements made or reserves, established, after commencement of the dissolution and liquidation of the Partnership.

“ Base Amount ” shall have the meaning set forth in Section 8.6.C(2) .

“ Board of Directors ” means the board of directors of the General Partner.

“ Business Day ” means any day except a Saturday, Sunday or other day on which commercial banks in New York, New York are authorized or required by law to be closed.

“ Capital Account ” means, with respect to any Partner, the Capital Account maintained for such Partner in accordance with the following provisions:

(a) To each Partner’s Capital Account there shall be added such Partner’s Capital Contributions, such Partner’s share of Net Income and any items in the nature of income or gain which are specially allocated pursuant to Section 6.3 , and the amount of any Partnership liabilities assumed by such Partner or which are secured by any property distributed to such Partner.

(b) From each Partner’s Capital Account there shall be subtracted the amount of cash and the Gross Asset Value of any property distributed to such Partner pursuant to any provision of this Agreement, such Partner’s distributive share of Net Losses and any items in the nature of expenses or losses which are specially allocated pursuant to Section 6.3 , and the amount of any liabilities of such Partner assumed by the Partnership or which are secured by any property contributed by such Partner to the Partnership (except to the extent already reflected in the amount of such Partner’s Capital Contribution).

(c) In the event any interest in the Partnership is transferred in accordance with the terms of this Agreement (which does not result in a termination of the Partnership for federal income tax purposes), the transferee shall succeed to the Capital Account of the transferor to the extent it relates to the transferred interest.

4

(d) In determining the amount of any liability for purposes of subsections (a) and (b) hereof, there shall be taken into account Code Section 752(c) and any other applicable provisions of the Code and Regulations.

(e) Upon the exercise of a non-compensatory option (within the meaning of Proposed Treasury Regulations Section 1.721-2(d), as the same may be finalized), including the conversion of Series C Preferred Units into Common Units (if necessary), (x) the adjustments and allocations required by the Proposed Treasury Regulations relating to non-compensatory options (as the same may be finalized), including Proposed Treasury Regulations Section 1.704-1(b)(2)(iv)(h)(2) and (s) (as the same may be finalized) and Proposed Regulations Section 1.704-1(b)(4)(ix) (as the same may be finalized), shall be made, or (y) prior to the finalization of such Proposed Treasury Regulations, such other adjustments and allocations shall be made at such times as determined by the General Partner in its sole discretion.

(f) The foregoing provisions and the other provisions of this Agreement relating to the maintenance of Capital Accounts are intended to comply with Regulations Sections 1.704-1(b) and 1.704-2, and shall be interpreted and applied in a manner consistent with such Regulations. In the event the General Partner shall determine that it is prudent to modify the manner in which the Capital Accounts, or any debits or credits thereto (including, without limitation, debits or credits relating to liabilities which are secured by contributed or distributed property or which are assumed by the Partnership, the General Partner, or the Limited Partners) are computed in order to comply with such Regulations, the General Partner may make such modification, provided that it is not likely to have a material effect on the amounts distributable to any Person pursuant to Article 13 of this Agreement upon the dissolution of the Partnership. The General Partner also shall (i) make any adjustments that are necessary or appropriate to maintain equality between the Capital Accounts of the Partners and the amount of Partnership capital reflected on the Partnership’s balance sheet, as computed for book purposes, in accordance with Regulations Section 1.704-1(b)(2)(iv)(q), and (ii) make any appropriate modifications in the event unanticipated events might otherwise cause this Agreement not to comply with Regulations Section 1.704-1(b), Section 1.704-2 and, Proposed Regulations Section 1.704-1(b)(2)(iv)(h)(2) and (s) (as the same may be finalized).

“ Capital Account Limitation ” shall have the meaning set forth in Section 8.7.B .

“ Capital Contribution ” means, with respect to any Partner, the amount of money and the initial Gross Asset Value of any property (other than money) contributed to the Partnership by such Partner (net of any liabilities assumed by the Partnership relating to such property and any liability to which such property is subject).

“ Cash Amount ” means, with respect to any Common Units subject to a Redemption, an amount of cash equal to the Deemed Partnership Interest Value attributable to such Common Units.

“ Certificate ” means the Certificate of Limited Partnership relating to the Partnership filed in the office of the Maryland State Department of Assessments and Taxation on July 20, 2004, as amended from time to time in accordance with the terms hereof and the Act.

5

“ Charter ” means the Articles of Amendment and Restatement of the General Partner filed with the Maryland State Department of Assessments and Taxation on October 26, 2004, as amended and restated from time to time.

“ Class C Unitholder ” means a Partner that holds Class C Units issued pursuant to one or more Class C Unit Agreements.

“ Class C Units ” shall have the meaning set forth in Section 18.1 .

“ Class C Units Agreement ” shall mean the applicable Class C Profits Interest Units Agreement between the Partnership and the applicable Class C Unitholder with respect to the Class C Units.

“ Class C Units Change in Control ” means, with respect to the Class C Units issued to a Partner pursuant to a Class C Units Agreement, a “Change in Control” as defined in that Class C Units Agreement.

“ Class C Units Change in Control Date ” means, with respect to the Class C Units issued to a Partner pursuant to a Class C Units Agreement, the “Change in Control Date” as defined in that Class C Unit Agreement.

“ Class C Units Measurement Date ” means, with respect to the Class C Units issued to a Partner pursuant to a Class C Units Agreement, the “Measurement Date” as defined in that Class C Units Agreement.

“ Class C Units Performance Condition ” means, with respect to the Class C Units issued to a Partner pursuant to a Class C Units Agreement, the Performance Condition as defined in that Class C Units Agreement.

“ Class C Service Condition Unit ” means, with respect to the Class C Units issued to a Partner pursuant to a Class C Units Agreement, a Service Condition Unit as defined in that Class C Units Agreement.

“ Code ” means the Internal Revenue Code of 1986, as amended from time to time or any successor statute thereto. Any reference herein to a specific section or sections of the Code shall be deemed to include a reference to any corresponding provision of future law.

“ Common-Equivalent Units ” means Partnership Units that are either Common Units or Profits Interest Units.

“ Common Unit Economic Balance ” shall have the meaning set forth in Section 6.2.C .

“ Common Units ” means Partnership Units that are not entitled to any preferences with respect to any other class or series of Partnership Units as to distribution or voluntary or involuntary liquidation, dissolution or winding-up of the Partnership and shall not include any Profits Interest Units.

6

“ Consent ” means the consent to, approval of, or vote on a proposed action by a Partner given in accordance with Article 14 .

“ Consent of the Limited Partners ” means the Consent of a Majority in Interest of the Limited Partners, which Consent shall be obtained prior to the taking of any action for which it is required by this Agreement and may be given or withheld by a Majority in Interest of the Limited Partners, unless otherwise expressly provided herein, in their sole and absolute discretion.

“ Consent of the Partners ” means the Consent of Holders of Common-Equivalent Units holding Percentage Interests that in the aggregate are equal to or greater than thirty-five percent (35%) of the aggregate Percentage Interests of all Holders of Common-Equivalent Units, which Consent shall be obtained prior to the taking of any action for which it is required by this Agreement and may be given or withheld by such Holders of Common-Equivalent Units, in their sole and absolute discretion.

“ Constituent Person ” shall have the meaning set forth in Section 8.7.F .

“ Constructively Own ” means ownership under the constructive ownership rules described in Exhibit C .

“ Contributed Property ” means each property or other asset, in such form as may be permitted by the Act, but excluding cash, contributed or deemed contributed to the Partnership (or, to the extent provided in applicable Regulations, deemed contributed to the Partnership on termination and reconstitution thereof pursuant to Section 708 of the Code).

“ Conversion Date ” shall have the meaning set forth in Section 8.7.B .

“ Conversion Notice ” shall have the meaning set forth in Section 8.7.B .

“ Conversion Right ” shall have the meaning set forth in Section 8.7.A .

“ Debt ” means, as to any Person, as of any date of determination, (i) all indebtedness of such Person for borrowed money or for the deferred purchase price of property or services; (ii) all amounts owed by such Person to banks or other Persons in respect of reimbursement obligations under letters of credit, surety bonds, guarantees and other similar instruments guaranteeing payment or other performance of obligations by such Person; (iii) all indebtedness for borrowed money or for the deferred purchase price of property or services secured by any lien on any property owned by such Person, to the extent attributable to such Person’s interest in such property, even though such Person has not assumed or become liable for the payment thereof; and (iv) lease obligations of such Person which, in accordance with generally accepted accounting principles, should be capitalized.

“ Deemed Partnership Interest Value ” means, as of any date with respect to any class of Partnership Interests, the Deemed Value of the Partnership Interests of such class multiplied by the applicable Percentage Interest of such class.

7

“ Deemed Value of the Partnership Interests ” means, as of any date with respect to any class or series of Partnership Interests, (i) the total number of Partnership Units of the General Partner in such class or series of Partnership Interests (as provided for in Sections 4.1 and 4.3.B ) issued and outstanding as of the close of business on such date multiplied by the Fair Market Value determined as of such date of a share of capital stock of the General Partner which corresponds to such class or series of Partnership Interests, as adjusted (x) pursuant to Section 7.5 (in the event the General Partner acquires material assets, other than on behalf of the Partnership) and (y) for stock dividends and distributions, stock splits and subdivisions, reverse stock splits and combinations, distribution of warrants or options and distributions of evidences of indebtedness or assets not received by the General Partner pursuant to a pro rata distribution by the Partnership; (ii)  divided by the Percentage Interest of the General Partner in such class or series of Partnership Interests on such date; provided , that if no outstanding shares of capital stock of the General Partner correspond to a class of series of Partnership Interests, the Deemed Value of the Partnership Interests with respect to such class or series shall be equal to an amount reasonably determined by the General Partner.

“ Depreciation ” means, for each fiscal year or other period, an amount equal to the depreciation, amortization or other cost recovery deduction allowable with respect to an asset for such year or other period, except that if the Gross Asset Value of an asset differs from its adjusted basis for federal income tax purposes at the beginning of such year or other period, Depreciation shall be an amount which bears the same ratio to such beginning Gross Asset Value as the federal income tax depreciation, amortization or other cost recovery deduction for such year or other period bears to such beginning adjusted tax basis; provided , however , that if the federal income tax depreciation, amortization or other cost recovery deduction for such year is zero, Depreciation shall be determined with reference to such beginning Gross Asset Value using any reasonable method selected by the General Partner.

“ Distribution Payment Date ” means the dates upon which the General Partner makes distributions in accordance with Section 5.1 .

“ Distribution Period ” means the period from the day immediately following a Distribution Payment Date through the date that is the subsequent Distribution Payment Date.

“ Economic Capital Account Balance ” shall have the meaning set forth in Section 6.2.C .

“ Effective Date ” means the date of closing of the initial public offering of REIT Shares upon which date contributions set forth on Exhibit A shall become effective.

“ ERISA ” means the Employee Retirement Income Security Act of 1974, as amended.

“ Excess Units ” means Common Units that have been tendered for Redemption to the extent the issuance of REIT Shares in exchange for such units would violate the restrictions on ownership or transfer of the REIT Shares set forth in the Charter.

8

“ Exchange Act ” means the Securities Exchange Act of 1934, as amended, and the rules and regulations of the Securities and Exchange Commission promulgated thereunder and any successor statute thereto.

“ Fair Market Value ” means, with respect to any share of capital stock of the General Partner, the average of the daily market price for the ten (10) consecutive trading days immediately preceding the date with respect to which “Fair Market Value” must be determined hereunder or, if such date is not a Business Day, the immediately preceding Business Day. The market price for each such trading day shall be: (i) if such shares are listed or admitted to trading on any securities exchange, the closing price, regular way, on such day, or if no such sale takes place on such day, the average of the closing bid and asked prices on such day, (ii) if such shares are not listed or admitted to trading on any securities exchange, the last reported sale price on such day or, if no sale takes place on such day, the average of the closing bid and asked prices on such day, as reported by a reliable quotation source designated by the General Partner, or (iii) if such shares are not listed or admitted to trading on any securities exchange and no such last reported sale price or closing bid and asked prices are available, the average of the reported high bid and low asked prices on such day, as reported by a reliable quotation source designated by the General Partner, or if there shall be no bid and asked prices on such day, the average of the high bid and low asked prices, as so reported, on the most recent day (not more than ten (10) days prior to the date in question) for which prices have been so reported; provided that , if there are no bid and asked prices reported during the ten (10) days prior to the date in question, the Fair Market Value of such shares shall be determined by the General Partner acting in good faith on the basis of such quotations and other information as it considers, in its reasonable judgment, appropriate. In the event the REIT Shares Amount for such shares includes rights that a holder of such shares would be entitled to receive, then the Fair Market Value of such rights shall be determined by the General Partner acting in good faith on the basis of such quotations and other information as it considers, in its reasonable judgment, appropriate; and provided , further that , in connection with determining the Deemed Value of the Partnership Interests for purposes of determining the number of additional Partnership Units issuable upon a Capital Contribution funded by any offering of shares of capital stock of the General Partner by the General Partner, whether registered under the Securities Act or exempt from such registration, underwritten, offered and sold directly to investors or through agents or other intermediaries or otherwise distributed, the Fair Market Value of such shares shall be the gross offering price per share of such class of capital stock sold. Notwithstanding the foregoing, the General Partner in its reasonable discretion may use a different “Fair Market Value” for purposes of making the determinations under subparagraph (b) of the definition of “Gross Asset Value” and Section 4.3.D in connection with the contribution of Property or cash to the Partnership by a third party, provided such value shall be based upon the value per REIT Share (or per Partnership Unit) agreed upon by the General Partner and such third party for purposes of such contribution.

“ Forced Conversion ” shall have the meaning set forth in Section 8.7.C .

“ Forced Conversion Notice ” shall have the meaning set forth in Section 8.7.C .

“ Fourth Amended and Restated Partnership Agreement ” shall have the meaning set forth in the recitals.

9

“ General Partner ” means the Company or its successor as general partner of the Partnership.

“ General Partner Interest ” means a Partnership Interest held by the General Partner. A General Partner Interest may be expressed as a number of Partnership Units.

“ Gross Asset Value ” means, with respect to any asset, the asset’s adjusted basis for federal income tax purposes, except as follows:

(a) The initial Gross Asset Value of any asset contributed by a Partner to the Partnership shall be the gross fair market value of such asset (subject to any adjustments required with respect to the conversion feature of the Series C Preferred Units and any other securities issued by the Company that are exercisable or convertible into Common Units, as determined by the General Partner in its sole discretion), as determined by the contributing Partner and the General Partner (as set forth on Exhibit A attached hereto, as such Exhibit may be amended from time to time); provided , that if the contributing Partner is the General Partner then, except with respect to the General Partner’s initial Capital Contribution which shall be determined as set forth on Exhibit A , the determination of the fair market value of the contributed asset shall be determined (i) by the price paid by the General Partner if the asset is acquired by the General Partner contemporaneously with its contribution to the Partnership, (ii) by Appraisal, if otherwise acquired by the General Partner, (iii) by the amount of cash if the asset is cash, and (iv) as reasonably determined by the General Partner if the asset is REIT Shares or other shares of capital stock of the Company.

(b) The Gross Asset Values of all Partnership assets shall be adjusted to equal their respective gross fair market values, as determined by the General Partner using such reasonable method of valuation as it may adopt, provided , however , that for such purpose, the net value of all of the Partnership assets, in the aggregate, shall be equal to the Deemed Value of the Partnership Interests of all classes of Partnership Interests then outstanding, regardless of the method of valuation adopted by the General Partner, immediately prior to the times listed below:

10

(c) The Gross Asset Value of any Partnership asset distributed to a Partner shall be the gross fair market value of such asset on the date of distribution as determined by the distributee and the General Partner, or if the distributee and the General Partner cannot agree on such a determination, by Appraisal.

(d) The Gross Asset Values of Partnership assets shall be increased (or decreased) to reflect any adjustments to the adjusted basis of such assets pursuant to Code Section 734(b) or Code Section 743(b), but only to the extent that such adjustments are taken into account in determining Capital Accounts pursuant to Regulations Section 1.704-1(b)(2)(iv)(m); provided , however , that Gross Asset Values shall not be adjusted pursuant to this subparagraph (d) to the extent that the General Partner reasonably determines that an adjustment pursuant to subparagraph (b) is necessary or appropriate in connection with a transaction that would otherwise result in an adjustment pursuant to this subparagraph (d).

(e) If the Gross Asset Value of a Partnership asset has been determined or adjusted pursuant to subparagraph (a), (b), (d) or (f), such Gross Asset Value shall thereafter be adjusted by the Depreciation taken into account with respect to such asset for purposes of computing Net Income and Net Losses.

(f) If any unvested Profit Interest Units are forfeited, as described in Section 4.5.C(b) , upon such forfeiture, the Gross Asset Value of the Partnership’s assets shall be reduced by the amount of any reduction of such Partner’s Capital Account attributable to the forfeiture of such Profit Interest Units.

“ Holder ” means either the Partner or Assignee owning a Partnership Unit.

“ Immediate Family ” means, with respect to any natural Person, such natural Person’s estate or heirs or current spouse or former spouse, parents, parents-in-law, children (whether natural, adopted or by marriage), siblings and grandchildren and any trust or estate, all of the beneficiaries of which consist of such Person or such Person’s spouse, or former spouse, parents, parents-in-law, children, siblings or grandchildren.

11

“ Incapacity ” or “ Incapacitated ” means, (i) as to any individual Partner, death, total physical disability or entry by a court of competent jurisdiction adjudicating him or her incompetent to manage his or her Person or his or her estate; (ii) as to any corporation which is a Partner, the filing of a certificate of dissolution, or its equivalent, for the corporation or the revocation of its charter; (iii) as to any partnership which is a Partner, the dissolution and commencement of winding up of the partnership; (iv) as to any estate which is a Partner, the distribution by the fiduciary of the estate’s entire interest in the Partnership; (v) as to any trustee of a trust which is a Partner, the termination of the trust (but not the substitution of a new trustee); or (vi) as to any Partner, the bankruptcy of such Partner. For purposes of this definition, bankruptcy of a Partner shall be deemed to have occurred when (a) the Partner commences a voluntary proceeding seeking liquidation, reorganization or other relief under any bankruptcy, insolvency or other similar law now or hereafter in effect, (b) the Partner is adjudged as bankrupt or insolvent, or a final and nonappealable order for relief under any bankruptcy, insolvency or similar law now or hereafter in effect has been entered against the Partner, (c) the Partner executes and delivers a general assignment for the benefit of the Partner’s creditors, (d) the Partner files an answer or other pleading admitting or failing to contest the material allegations of a petition filed against the Partner in any proceeding of the nature described in clause (b) above, (e) the Partner seeks, consents to or acquiesces in the appointment of a trustee, receiver or liquidator for the Partner or for all or any substantial part of the Partner’s properties, (f) any proceeding seeking liquidation, reorganization or other relief of or against such Partner under any bankruptcy, insolvency or other similar law now or hereafter in effect has not been dismissed within 120 days after the commencement thereof, (g) the appointment without the Partner’s consent or acquiescence of a trustee, receiver or liquidator has not been vacated or stayed within 90 days of such appointment, or (h) an appointment referred to in clause (g) is not vacated within 90 days after the expiration of any such stay.

“ Indemnitee ” means (i) any Person subject to a claim or demand or made or threatened to be made a party to, or involved or threatened to be involved in, an action, suit or proceeding by reason of his or her status as (A) the General Partner or (B) a director or officer, employee or agent of the Partnership or the General Partner, and (ii) such other Persons (including Affiliates of the General Partner or the Partnership) as the General Partner may designate from time to time (whether before or after the event giving rise to potential liability), in its sole and absolute discretion.

“ IRS ” means the Internal Revenue Service, which administers the internal revenue laws of the United States.

“ Junior Units ” means Partnership Units representing any class or series of Partnership Interest ranking, as to distributions or voluntary or involuntary liquidation, dissolution or winding-up of the Partnership, junior to the Series A Preferred Units, the Series B Preferred Units and the Series C Preferred Units.

“ Limited Partner ” means any Person named as a Limited Partner in Exhibit A attached hereto, as such Exhibit may be amended from time to time, or any Substituted Limited Partner or Additional Limited Partner, in such Person’s capacity as a Limited Partner in the Partnership.

12

“ Limited Partner Interest ” means a Partnership Interest of a Limited Partner representing a fractional part of the Partnership Interests of all Limited Partners and includes any and all benefits to which the Holder of such a Partnership Interest may be entitled as provided in this Agreement, together with all obligations of such Person to comply with the terms and provisions of this Agreement. A Limited Partner Interest may be expressed as a number of Partnership Units.

“ Liquidating Event ” shall have the meaning set forth in Section 13.1 .

“ Liquidator ” shall have the meaning set forth in Section 13.2.A .

“ Majority in Interest of the Limited Partners ” means Limited Partners (other than any Limited Partner fifty percent (50%) or more of whose equity is owned, directly or indirectly, by the General Partner) holding in the aggregate Percentage Interests that are greater than fifty percent (50%) of the aggregate Percentage Interests of all Limited Partners (other than any Limited Partner fifty percent (50%) or more of whose equity is owned, directly or indirectly, by the General Partner).

“ Net Income ” or “ Net Loss ” means for each fiscal year of the Partnership, an amount equal to the Partnership’s taxable income or loss for such fiscal year, determined in accordance with Code Section 703(a) (for this purpose, all items of income, gain loss, or deduction required to be stated separately pursuant to Code Section 703(a)(1) shall be included in taxable income or loss), with the following adjustments:

(a) Any income of the Partnership that is exempt from federal income tax and not otherwise taken into account in computing Net Income or Net Loss pursuant to this definition of Net Income or Net Loss shall be added to such taxable income or loss;

(b) Any expenditures of the Partnership described in Code Section 705(a)(2)(B) or treated as Code Section 705(a)(2)(B) expenditures pursuant to Regulations Section 1.704-1(b)(2)(iv)(i), and not otherwise taken into account in computing Net Income or Net Loss pursuant to this definition of Net Income or Net Loss shall be subtracted from such taxable income or loss;

(c) In the event the Gross Asset Value of any Partnership asset is adjusted pursuant to subparagraph (b) or subparagraph (c) of the definition of Gross Asset Value, the amount of such adjustment shall be taken into account as gain or loss from the disposition of such asset for purposes of computing Net Income or Net Loss;

(d) Gain or loss resulting from any disposition of property with respect to which gain or loss is recognized for federal income tax purposes shall be computed by reference to the Gross Asset Value of the property disposed of, notwithstanding that the adjusted tax basis of such property differs from its Gross Asset Value;

(e) In lieu of the depreciation, amortization, and other cost recovery deductions taken into account in computing such taxable income or loss, there shall be taken into account Depreciation for such fiscal year;

13

(f) To the extent an adjustment to the adjusted tax basis of any Partnership asset pursuant to Code Section 734(b) or Code Section 743(b) is required pursuant to Regulations Section 1.704-1(b)(2)(iv)(m)(4) to be taken into account in determining Capital Accounts as a result of a distribution other than in liquidation of a Partner’s interest in the Partnership, the amount of such adjustment shall be treated as an item of gain (if the adjustment increases the basis of the asset) or loss (if the adjustment decreases the basis of the asset) from the disposition of the asset and shall be taken into account for purposes of computing Net Income or Net Loss; and

(g) Notwithstanding any other provision of this definition of Net Income or Net Loss, any items which are specially allocated pursuant to Section 6.3 shall not be taken into account in computing Net Income or Net Loss. The amounts of the items of Partnership income, gain, loss, or deduction available to be specially allocated pursuant to Section 6.3 shall be determined by applying rules analogous to those set forth in this definition of Net Income or Net Loss.

“ Net Proceeds ” shall have the meaning set forth in Section 8.6.C(2) .

“ New Securities ” means (i) any rights, options, warrants or convertible or exchangeable securities having the right to subscribe for or purchase REIT Shares or other shares of capital stock of the General Partner, excluding in each case, grants under any Stock Plan, or (ii) any Debt issued by the General Partner that provides any of the rights described in clause (i).

“ Nonrecourse Deductions ” shall have the meaning set forth in Regulations Section 1.704-2(b)(1), and the amount of Nonrecourse Deductions for a Partnership Year shall be determined in accordance with the rules of Regulations Section 1.704-2(c).

“ Nonrecourse Liability ” shall have the meaning set forth in Regulations Section 1.752-1(a)(2).

“ Notice of Redemption ” means the Notice of Redemption substantially in the form of Exhibit B to this Agreement.

“ Offered Shares ” shall have the meaning set forth in Section 8.6.C(1) .

“ Option Agreement Effective Date ” means the date the Partnership acquires an Option Interest pursuant to the Option Agreement in exchange for Common Units.

“ Option Agreement ” means that certain option agreement by and between the Partnership and Global Innovation Partners, LLC, whereby such entity granted the Partnership an option to acquire the Option Interests.

“ Option Interests ” means that certain property or interest in entities which own certain real property.

“ Parity Preferred Unit ” means any class or series of Partnership Interests of the Partnership now or hereafter authorized, issued or outstanding expressly designated by the Partnership to rank on a parity with the Series A Preferred Units, the Series B Preferred Units

14

and the Series C Preferred Units with respect to distributions or rights upon voluntary or involuntary liquidation, winding-up or dissolution of the Partnership, or both, as the context may require.

“ Partner ” means a General Partner or a Limited Partner, and “ Partners ” means the General Partner and the Limited Partners.

“ Partner Minimum Gain ” means an amount, with respect to each Partner Nonrecourse Debt, equal to the Partnership Minimum Gain that would result if such Partner Nonrecourse Debt were treated as a Nonrecourse Liability, determined in accordance with Regulations Section 1.704-2(i)(3).

“ Partner Nonrecourse Debt ” shall have the meaning set forth in Regulations Section 1.704-2(b)(4).

“ Partner Nonrecourse Deductions ” shall have the meaning set forth in Regulations Section 1.704-2(i)(2), and the amount of Partner Nonrecourse Deductions with respect to a Partner Nonrecourse Debt for a Partnership Year shall be determined in accordance with the rules of Regulations Section 1.704-2(i)(2).

“ Partnership ” means the limited partnership formed under the Act and pursuant to this Agreement, and any successor thereto.

“ Partnership Interest ” means, an ownership interest in the Partnership of a Limited Partner or the General Partner and includes any and all benefits to which the Holder of such a Partnership Interest may be entitled as provided in this Agreement, together with all obligations of such Person to comply with the terms and provisions of this Agreement. There may be one or more classes or series of Partnership Interests as provided in Section 4.3 , 4.4 or 4.5 . A Partnership Interest may be expressed as a number of Partnership Units. Unless otherwise expressly provided for by the General Partner at the time of the original issuance of any Partnership Interests, all Partnership Interests (whether of a Limited Partner or a General Partner) shall be of the same class or series. The Partnership Interests represented by the Common Units, the Profits Interest Units, the Series A Preferred Units, the Series B Preferred Units and the Series C Preferred Units are the only Partnership Interests and each such type of Unit is a separate class of Partnership Interest for all purposes of this Agreement.

“ Partnership Minimum Gain ” shall have the meaning set forth in Regulations Section 1.704-2(b)(2), and the amount of Partnership Minimum Gain, as well as any net increase or decrease in Partnership Minimum Gain, for a Partnership Year shall be determined in accordance with the rules of Regulations Section 1.704-2(d).

“ Partnership Record Date ” means the record date established by the General Partner for the distribution of Available Cash pursuant to Section 5.1 , which record date shall be the same as the record date established by the General Partner for a distribution to its stockholders of some or all of its portion of such distribution.

“ Partnership Unit ” or “ Unit ” means, with respect to any class of Partnership Interest, a fractional, undivided share of such class of Partnership Interest issued pursuant to

15

Sections 4.1 and 4.3 , 4.4 or 4.5 . The ownership of Partnership Units may be evidenced by a certificate for units substantially in the form of Exhibit D hereto or as the General Partner may determine with respect to any class of Partnership Units issued from time to time under Section 4.1 , 4.3 , 4.4 and 4.5 .

“ Partnership Year ” means the fiscal year of the Partnership, which shall be the calendar year.

“ Percentage Interest ” means, as to a Partner holding a class or series of Partnership Interests, its interest in such class or series as determined by dividing the Partnership Units of such class or series owned by such Partner by the total number of Partnership Units of such class then outstanding as specified in Exhibit A attached hereto, as such Exhibit may be amended from time to time. If the Partnership issues more than one class or series of Partnership Interests, the interest in the Partnership among the classes or series of Partnership Interests shall be determined as set forth in the amendment to the Partnership Agreement setting forth the rights and privileges of such additional classes or series of Partnership Interest, if any, as contemplated by Section 4.3.C .

“ Person ” means an individual or a corporation, partnership, limited liability company, trust, unincorporated organization, association or other entity.

“ Plan ” means the Digital Realty Trust, Inc. and Digital Realty Trust, L.P. 2004 Incentive Award Plan.

“ Plan Asset Regulation ” means the regulations promulgated by the United States Department of Labor in Title 29, Code of Federal Regulations, Part 2510, Section 101.3, and any successor regulations thereto.

“ Pledge ” shall have the meaning set forth in Section 11.3.A .

“ Preferred Distribution Shortfall ” means, with respect to any Partnership Interests that are entitled to any preference in distributions of Available Cash pursuant to this Agreement, the aggregate amount of the required distributions for such outstanding Partnership Interests for all prior distribution periods minus the aggregate amount of the distributions made with respect to such outstanding Partnership Interests pursuant to this Agreement.

“ Preferred Share ” means a share of the General Partner’s preferred stock, par value $.01 per share, with such rights, priorities and preferences as shall be designated by the Board of Directors in accordance with the General Partner’s Charter.

“ Pricing Agreements ” shall have the meaning set forth in Section 8.6.C(3)(b) .

“ Primary Offering Notice ” shall have the meaning set forth in Section 8.6.F(4) .

“ Profits Interest Units ” means long term incentive partnership units of the Partnership having the rights, voting powers, restrictions, limitations as to distributions, qualifications and terms and conditions of redemption and conversion set forth herein and in the Plan (including the Class C Units). Profits Interest Units can be issued in one or more classes, or

16

one or more series of any such classes bearing such relationship to one another as to allocations, distributions, and other rights as the general Partner shall determine in its sole and absolute discretion subject to Maryland law.

“ Profits Interest Unitholder ” means a Partner that holds Profits Interest Units.

“ Properties ” means such interests in real property and personal property including without limitation, fee interests, interests in ground leases, interests in joint ventures, interests in mortgages, and Debt instruments as the Partnership may hold from time to time.

“ Qualified REIT Subsidiary ” means any Subsidiary of the General Partner that is a “qualified REIT subsidiary” within the meaning of Section 856(i) of the Code.

“ Qualified Transferee ” means an “Accredited Investor” as such term is defined in Rule 501 promulgated under the Securities Act.

“ Redemption ” shall have the meaning set forth in Section 8.6.A .

“ Regulations ” means the Income Tax Regulations promulgated under the Code, as such regulations may be amended from time to time (including corresponding provisions of succeeding regulations).

“ Regulatory Allocations ” shall have the meaning set forth in Section 6.3.A(viii) .

“ REIT ” means a real estate investment trust, as defined under Sections 856 through 860 of the Code.

“ REIT Requirements ” shall have the meaning set forth in Section 5.1 .

“ REIT Series A Preferred Share ” means a share of 8.5% Series A Cumulative Redeemable Preferred Stock, par value $.01 per share, liquidation preference $25 per share, of the General Partner.

“ REIT Series B Preferred Share ” means a share of 7.875% Series B Cumulative Redeemable Preferred Stock, par value $.01 per share, liquidation preference $25 per share, of the General Partner.

“ REIT Series C Preferred Share ” means a share of 4.375% Series C Cumulative Convertible Preferred Stock, par value $.01 per share, liquidation preference $25 per share, of the General Partner.

“ REIT Share ” means a share of common stock, par value $.01 per share, of the General Partner.

“ REIT Shares Amount ” means, as of any date, an aggregate number of REIT Shares equal to the number of Tendered Units, as adjusted (x) pursuant to Section 7.5 (in the event the General Partner acquires material assets, other than on behalf of the Partnership) and (y) for stock dividends and distributions, stock splits and subdivisions, reverse stock splits and

17

combinations, distributions of rights, warrants or options, and distributions of evidences of indebtedness or assets relating to assets not received by the General Partner pursuant to a pro rata distribution by the Partnership.

“ REIT Share Market Value ” means, with respect to a REIT Share, the average of the daily market price for the ten (10) consecutive trading days immediately preceding the Specified Redemption Date. The market price for each such trading day shall be: (i) if the REIT Shares are listed or admitted to trading on any securities exchange, the closing price, regular way, on such day, or if no such sale takes place on such day, the average of the closing bid and asked prices on such day, in either case as reported in the principal consolidated transaction reporting system, (ii) if the REIT Shares are not listed or admitted to trading on any securities exchange, the last reported sale price on such day or, if no sale takes place on such day, the average of the closing bid and asked prices on such day, as reported by a reliable quotation source designated by the Company, or (iii) if the REIT Shares are not listed or admitted to trading on any securities exchange and no such last reported sale price or closing bid and asked prices are available, the average of the reported high bid and low asked prices on such day, as reported by a reliable quotation source designated by the Company, or if there shall be no bid and asked prices on such day, the average of the high bid and low asked prices, as so reported, on the most recent day (not more than ten (10) days prior to the date in question) for which prices have been so reported; provided that if there are no bid and asked prices reported during the ten (10) days prior to the date in question, the REIT Share Market Value of the REIT Share shall be determined by the Board of Directors of the Company acting in good faith on the basis of such quotations and other information as it considers, in its reasonable judgment, appropriate.

“ ROFO Agreement Effective Date ” means the date the Partnership acquires the ROFO Interests pursuant to the respective ROFO Agreements in exchange for Common-Equivalent Units.

“ ROFO Agreement ” means those certain Right of First Offer Agreements by and between the Partnership and Global Innovation Partners, LLC, whereby such entities granted the Partnership the right to acquire the ROFO Interests.

“ ROFO Interests ” means those certain properties or interests in entities which own certain real property described in the respective ROFO Agreements.

“ Securities Act ” means the Securities Act of 1933, as amended, and the rules and regulations of the Securities and Exchange Commission promulgated thereunder and any successor statute thereto.

“ Series A Articles Supplementary ” means the Articles Supplementary of the General Partner in connection with its REIT Series A Preferred Shares, as filed with the Maryland State Department of Assessments and Taxation on February 8, 2005.

“ Series A Preferred Capital ” means a Capital Account balance equal to the product of (i) the number of Series A Preferred Units then held by the General Partner multiplied by (ii) the sum of $25, any Preferred Distribution Shortfall per Series A Preferred Unit and any accrued and unpaid distribution per Series A Preferred Unit for the current distribution period.

18

“ Series A Preferred Units ” means the Partnership’s 8.5% Series A Cumulative Redeemable Partnership Units, with the rights, priorities and preferences set forth herein.

“ Series A Preferred Unit Distribution Payment Date ” shall have the meaning set forth in Section 16.2.A.

“ Series A Priority Return ” shall mean an amount equal to 8.5% per annum on the stated value of $25 per Series A Preferred Unit (equivalent to the fixed annual amount of $2.125 per Series A Preferred Unit), commencing on the date of original issuance of the Series A Preferred Units. For any partial quarterly period, the amount of the Series A Priority Return shall be prorated and computed on the basis of a 360-day year consisting of twelve 30-day months.

“ Series B Articles Supplementary ” means the Articles Supplementary of the General Partner in connection with its REIT Series B Preferred Shares, as filed with the Maryland State Department of Assessments and Taxation on July 25, 2005.

“ Series B Preferred Capital ” means a Capital Account balance equal to the product of (i) the number of Series B Preferred Units then held by the General Partner multiplied by (ii) the sum of $25, any Preferred Distribution Shortfall per Series B Preferred Unit and any accrued and unpaid distribution per Series B Preferred Unit for the current distribution period.

“ Series B Preferred Units ” means the Partnership’s 7.875% Series B Cumulative Redeemable Partnership Units, with the rights, priorities and preferences set forth herein.

“ Series B Preferred Unit Distribution Payment Date ” shall have the meaning set forth in Section 17.2.A.

“ Series B Priority Return ” shall mean an amount equal to 7.875% per annum on the stated value of $25 per Series B Preferred Unit (equivalent to the fixed annual amount of $1.96875 per Series B Preferred Unit), commencing on the date of original issuance of the Series B Preferred Units. For any partial quarterly period, the amount of the Series B Priority Return shall be prorated and computed on the basis of a 360-day year consisting of twelve 30-day months.

“ Series C Articles Supplementary ” means the Articles Supplementary of the General Partner in connection with its REIT Series C Preferred Shares, as filed with the Maryland State Department of Assessments and Taxation on April 9, 2007.

“ Series C Preferred Capital ” means a Capital Account balance equal to the product of (i) the number of Series C Preferred Units then held by the General Partner multiplied by (ii) the sum of $25, any Preferred Distribution Shortfall per Series C Preferred Unit and any accrued and unpaid distribution per Series C Preferred Unit for the current distribution period.

“ Series C Preferred Units ” means the Partnership’s 4.375% Series C Cumulative Convertible Partnership Units, with the rights, priorities and preferences set forth herein.

19

“ Series C Preferred Unit Distribution Payment Date ” shall have the meaning set forth in Section 19.2.A.

“ Series C Priority Return ” shall mean an amount equal to 4.375% per annum on the stated value of $25 per Series C Preferred Unit (equivalent to the fixed annual amount of $1.09375 per Series C Preferred Unit), commencing on the date of original issuance of the Series C Preferred Units. For any partial quarterly period, the amount of the Series C Priority Return shall be prorated and computed on the basis of a 360-day year consisting of twelve 30-day months.

“ Single Funding Notice ” shall have the meaning set forth in Section 8.6.C(1)(b) .

“ Specified Redemption Date ” means the day of receipt by the General Partner of a Notice of Redemption; provided that in the event the General Partner elects a Stock Offering Funding pursuant to Section 8.6.C , such Specified Redemption Date shall be deferred until the next Business Day following the date of the closing of the Stock Offering Funding.

“ Stock Offered Funding Amount ” shall have the meaning set forth in Section 8.6.C(2) .

“ Stock Offering Funding ” shall have the meaning set forth in Section 8.6.C(1)(a) .

“ Stock Plan ” means any stock incentive, stock option, stock ownership or employee benefits plan of the General Partner.

“ Subsequent Redemption ” shall have the meaning set forth in Section 8.6.F(4) .

“ Subsidiary ” means, with respect to any Person, any corporation, partnership, limited liability company, joint venture or other entity of which a majority of (i) the voting power of the voting equity securities or (ii) the outstanding equity interests is owned, directly or indirectly, by such Person.

“ Subsidiary Partnership ” means any partnership or limited liability company that is a Subsidiary of the Partnership.

“ Substituted Limited Partner ” means a Person who is admitted as a Limited Partner to the Partnership pursuant to Section 11.4 .

“ Surviving Partnership ” shall have the meaning set forth in Section 11.2.B(2) .

“ Tax Items ” shall have the meaning set forth in Section 6.4.A .

“ Tenant ” means any tenant from which the General Partner derives rent either directly or indirectly through partnerships, including the Partnership.

“ Tendered Units ” shall have the meaning set forth in Section 8.6.A .

“ Tendering Partner ” shall have the meaning set forth in Section 8.6.A .

20

“ Termination Transaction ” shall have the meaning set forth in Section 11.2.B .

“ Transaction ” shall have the meaning set forth in Section 8.7.F .

“ Twelve-Month Period ” means a twelve-month period ending on the first anniversary of the Effective Date or on each subsequent anniversary thereof.

“ Unvested Profits Interest Units ” shall have the meaning set forth in Section 4.5.C .

“ Vested Profits Interest Units ” shall have the meaning set forth in Section 4.5.C .

“ Vesting Agreement ” means each or any, as the context implies, vesting agreement entered into by a Profits Interest Unitholder upon acceptance of an award of Unvested Profits Interest Units under the Plan (as such agreement may be amended, modified or supplemented from time to time), including any Class C Unit Agreements.

“ Withdrawing Partner ” shall have the meaning set forth in Section 8.6.C(3)(c) .

Section 1.2 Rules of Construction

Unless otherwise indicated, all references herein to “ REIT ,” “ REIT Requirements ,” “ REIT Shares ” and “ REIT Shares Amount ” with respect to the General Partner shall apply only with reference to the Company.

ARTICLE 2.

ORGANIZATIONAL MATTERS

Section 2.1 Organization

The Partnership is a limited partnership formed pursuant to the provisions of the Act and upon the terms and conditions set forth in this Agreement. Except as expressly provided herein, the rights and obligations of the Partners and the administration and termination of the Partnership shall be governed by the Act. The Partnership Interest of each Partner shall be personal property for all purposes.

Section 2.2 Name

The name of the Partnership is Digital Realty Trust, L.P. The Partnership’s business may be conducted under any other name or names deemed advisable by the General Partner, including the name of the General Partner or any Affiliate thereof. The words “Limited Partnership,” “L.P.,” “Ltd.” or similar words or letters shall be included in the Partnership’s name where necessary for the purposes of complying with the laws of any jurisdiction that so requires. The General Partner in its sole and absolute discretion may change the name of the Partnership at any time and from time to time and shall notify the Limited Partners of such change in the next regular communication to the Limited Partners.

21

Section 2.3 Registered Office and Agent; Principal Office

The name and address of the registered office and registered agent of the Partnership in the State of Maryland is National Registered Agents, Inc. of MD, 11 East Chase Street, Baltimore, MD 21202. The address of the principal office of the Partnership in the State of Maryland is c/o National Registered Agents, Inc. of MD, 11 East Chase Street, Baltimore, MD 21202. The principal office of the Partnership is located at 560 Mission Street, Suite 2900, San Francisco, California 94105, or such other place as the General Partner may from time to time designate by notice to the other Partners. The Partnership may maintain offices at such other place or places within or outside the State of Maryland as the General Partner deems advisable.

Section 2.4 Power of Attorney

A. Each Limited Partner and each Assignee constitutes and appoints the General Partner, any Liquidator, and authorized officers and attorneys-in-fact of each, and each of those acting singly, in each case with full power of substitution, as its true and lawful agent and attorney-in-fact, with full power and authority in its name, place and stead to:

(1) execute, swear to, acknowledge, deliver, file and record in the appropriate public offices (a) all certificates, documents and other instruments (including, without limitation, this Agreement and the Certificate and all amendments or restatements thereof) that the General Partner or the Liquidator deems appropriate or necessary to form, qualify or continue the existence or qualification of the Partnership as a limited partnership (or a partnership in which the Limited Partners have limited liability) in the State of Maryland and in all other jurisdictions in which the Partnership may conduct business or own property; (b) all instruments that the General Partner or any Liquidator deems appropriate or necessary to reflect any amendment, change, modification or restatement of this Agreement in accordance with its terms; (c) all conveyances and other instruments or documents that the General Partner or any Liquidator deems appropriate or necessary to reflect the dissolution and liquidation of the Partnership pursuant to the terms of this Agreement, including, without limitation, a certificate of cancellation; (d) all instruments relating to the admission, withdrawal, removal or substitution of any Partner pursuant to, or other events described in, Articles 11 , 12 or 13 or the Capital Contribution of any Partner; and (e) all certificates, documents and other instruments relating to the determination of the rights, preferences and privileges of Partnership Interests; and

(2) execute, swear to, acknowledge and file all ballots, consents, approvals, waivers, certificates and other instruments appropriate or necessary, in the sole and absolute discretion of the General Partner or any Liquidator, to make, evidence, give, confirm or ratify any vote, consent, approval, agreement or other action which is made or given by the Partners hereunder or is consistent with the terms of this Agreement or appropriate or necessary, in the sole discretion of the General Partner or any Liquidator, to effectuate the terms or intent of this Agreement.

Nothing contained herein shall be construed as authorizing the General Partner or any Liquidator to amend this Agreement except in accordance with Article 14 or as may be otherwise expressly provided for in this Agreement.

22

B. The foregoing power of attorney is hereby declared to be irrevocable and a power coupled with an interest, in recognition of the fact that each of the Partners will be relying upon the power of the General Partner and any Liquidator to act as contemplated by this Agreement in any filing or other action by it on behalf of the Partnership, and it shall survive and not be affected by the subsequent Incapacity of any Limited Partner or Assignee and the transfer of all or any portion of such Limited Partner’s or Assignee’s Common-Equivalent Units and shall extend to such Limited Partner’s or Assignee’s heirs, successors, assigns and personal representatives. Each such Limited Partner or Assignee hereby agrees to be bound by any representation made by the General Partner or any Liquidator, acting in good faith pursuant to such power of attorney; and each such Limited Partner or Assignee hereby waives any and all defenses which may be available to contest, negate or disaffirm the action of the General Partner or any Liquidator, taken in good faith under such power of attorney. Each Limited Partner or Assignee shall execute and deliver to the General Partner or any Liquidator, within 15 days after receipt of the General Partner’s or Liquidator’s request therefor, such further designation, powers of attorney and other instruments as the General Partner or the Liquidator, as the case may be, deems necessary to effectuate this Agreement and the purposes of the Partnership.

Section 2.5 Term

The term of the Partnership commenced on July 21, 2004 and shall continue until December 31, 2104 unless it is dissolved sooner pursuant to the provisions of Article 13 or as otherwise provided by law.

ARTICLE 3.

PURPOSE

Section 3.1 Purpose and Business

The purpose and nature of the business to be conducted by the Partnership is (i) to conduct any business that may be lawfully conducted by a limited partnership organized pursuant to the Act, (ii) to enter into any partnership, joint venture or other similar arrangement to engage in any business described in the foregoing clause (i) or to own interests in any entity engaged, directly or indirectly, in any such business and (iii) to do anything necessary or incidental to the foregoing; provided , however , that such business shall be limited to and conducted in such a manner as to permit the General Partner at all times to be classified as a REIT for federal income tax purposes, unless the General Partner ceases to qualify as a REIT for reasons other than the conduct of the business of the Partnership. In connection with the foregoing, and without limiting the General Partner’s right in its sole discretion to cease qualifying as a REIT, the Partners acknowledge that the General Partner’s current status as a REIT inures to the benefit of all the Partners and not solely the General Partner.

Section 3.2 Powers

The Partnership is empowered to do any and all acts and things necessary, appropriate, proper, advisable, incidental to or convenient for the furtherance and accomplishment of the purposes and business described herein and for the protection and benefit of the Partnership, including, without limitation, full power and authority, directly or through its

23

ownership interest in other entities, to enter into, perform and carry out contracts of any kind, borrow money and issue evidences of indebtedness, whether or not secured by mortgage, deed of trust, pledge or other lien, acquire, own, manage, improve and develop real property, and lease, sell, transfer and dispose of real property; provided , however , notwithstanding anything to the contrary in this Agreement, the Partnership shall not, absent the consent of the General Partner, which may be given or withheld in its sole and absolute discretion, take, or refrain from taking, any action which, in the judgment of the General Partner, in its sole and absolute discretion, could (i) adversely affect the ability of the General Partner to continue to qualify as a REIT, (ii) subject the General Partner to any taxes under Section 857 or Section 4981 of the Code, or (iii) violate any law or regulation of any governmental body or agency having jurisdiction over the General Partner or its securities, unless any such action (or inaction) under (i), (ii) or (iii) shall have been specifically consented to by the General Partner in writing.

Section 3.3 Partnership Only for Purposes Specified

The Partnership shall be a partnership only for the purposes specified in Section 3.1 , and this Agreement shall not be deemed to create a partnership among the Partners with respect to any activities whatsoever other than the activities within the purposes of the Partnership as specified in Section 3.1 . Except as otherwise provided in this Agreement, no Partner shall have any authority to act for, bind, commit or assume any obligation or responsibility on behalf of the Partnership, its properties or any other Partner. No Partner, in its capacity as a Partner under this Agreement, shall be responsible or liable for any indebtedness or obligation of another Partner, nor shall the Partnership be responsible or liable for any indebtedness or obligation of any Partner, incurred either before or after the execution and delivery of this Agreement by such Partner, except as to those responsibilities, liabilities, indebtedness or obligations incurred pursuant to and as limited by the terms of this Agreement and the Act.

Section 3.4 Representations and Warranties by the Parties

A. Each Partner that is an individual represents and warrants to each other Partner that (i) such Partner has the legal capacity to enter into this Agreement and perform such Partner’s obligations hereunder, (ii) the consummation of the transactions contemplated by this Agreement to be performed by such Partner will not result in a breach or violation of, or a default under, any agreement by which such Partner or any of such Partner’s property is or are bound, or any statute, regulation, order or other law to which such Partner is subject, (iii) such Partner is a “United States person” within the meaning of Section 7701(a)(30) of the Code, and (iv) this Agreement is binding upon, and enforceable against, such Partner in accordance with its terms.

B. Each Partner that is not an individual represents and warrants to each other Partner that (i) its execution and delivery of this Agreement and all transactions contemplated by this Agreement to be performed by it have been duly authorized by all necessary action, including without limitation, that of its general partner(s), member(s), committee(s), trustee(s), beneficiaries, directors and/or stockholder(s), as the case may be, as required, (ii) the consummation of such transactions shall not result in a breach or violation of, or a default under, its certificate of limited partnership, partnership agreement, trust agreement, limited liability

24

company operating agreement, charter or bylaws, as the case may be, any agreement by which such Partner or any of such Partner’s properties or any of its partners, members, beneficiaries, trustees or stockholders, as the case may be, is or are bound, or any statute, regulation, order or other law to which such Partner or any of its partners, members, trustees, beneficiaries or stockholders, as the case may be, is or are subject, (iii) such Partner is a “United States person” within the meaning of Section 7701(a)(30) of the Code and (iv) this Agreement is binding upon, and enforceable against, such Partner in accordance with its terms.

C. Each Partner represents, warrants, and agrees that it has acquired and continues to hold its interest in the Partnership for its own account for investment only and not for the purpose of, or with a view toward, the resale or distribution of all or any part thereof, nor with a view toward selling or otherwise distributing such interest or any part thereof at any particular time or under any predetermined circumstances. Each Partner further represents and warrants that it is a sophisticated investor, able and accustomed to handling sophisticated financial matters for itself, particularly real estate investments, and that it has a sufficiently high net worth that it does not anticipate a need for the funds it has invested in the Partnership in what it understands to be a highly speculative and illiquid investment. Each Partner represents, warrants and agrees that such Partner is an “accredited investor” (as such term is defined in Rule 501(a) of Regulation D under the Securities Act).

D. Each Partner acknowledges that (i) the Partnership Units (and any REIT Shares that might be exchanged therefor) have not been registered under the Securities Act and may not be transferred unless they are subsequently registered under the Securities Act or an exemption from such registration is available (it being understood that the Partnership has no intention of so registering the Partnership Units), (ii) a restrictive legend in the form set forth in Exhibit D shall be placed on the certificates representing the Partnership Units, and (iii) a notation shall be made in the appropriate records of the Partnership indicating that the Partnership Units are subject to restrictions on transfer.

E. Each Limited Partner further represents, warrants, covenants and agrees as follows:

(1) Except as provided in Exhibit E , at any time such Partner actually or Constructively Owns a 25% or greater capital interest or profits interest in the Partnership, it does not and will not, without the prior written consent of the General Partner, actually own or Constructively Own (a) with respect to any Tenant that is a corporation, any stock of such Tenant, and (b) with respect to any Tenant that is not a corporation, any interests in either the assets or net profits of such Tenant.

(2) Except as provided in Exhibit F , at any time such Partner actually or Constructively Owns a 25% or greater capital interest or profits interest in the Partnership, it does not, and agrees that it will not without the prior written consent of the General Partner, actually own or Constructively Own, any stock in the General Partner, other than any REIT Shares or other shares of capital stock of the General Partner such Partner may acquire (a) as a result of an exchange of Tendered Units pursuant to Section 8.6 or (b) upon the exercise of options granted or delivery of REIT Shares pursuant to any Stock Plan, in each case subject to the ownership limitations set forth in the General Partner’s Charter.

25

(3) Upon request of the General Partner, it will disclose to the General Partner the amount of REIT Shares or other shares of capital stock of the General Partner, or shares of capital stock or other interests in Tenants, that it actually owns or Constructively Owns.

(4) It understands that if, for any reason, (a) the representations, warranties or agreements set forth in E(1) or (2)  above are violated, or (b) the Partnership’s actual or Constructive Ownership of REIT Shares or other shares of capital stock of the General Partner violates the limitations set forth in the Charter, then (x) some or all of the Redemption rights of the Partners may become non-exercisable, and (y) some or all of the REIT Shares owned by the Partners may be automatically transferred to a trust for the benefit of a charitable beneficiary, as provided in the Charter.

(5) Without the consent of the General Partner, which may be given or withheld in its sole discretion, no Partner shall take any action that would cause (i) the Partnership at any time to have more than 100 partners, including as partners (“ flow through partners ”) those persons indirectly owning an interest in the Partnership through a partnership, limited liability company, S corporation or grantor trust (such entity, a “ flow through entity ”), but only if substantially all of the value of such person’s interest in the flow through entity is attributable to the flow through entity’s interest (direct or indirect) in the Partnership; or (ii) the Partnership Interest initially issued to such Partner or its predecessors to be held by more than seven (7) partners, including as partners any flow through partners.

F. The representations and warranties contained in this Section 3.4 shall survive the execution and delivery of this Agreement by each Partner and the dissolution and winding-up of the Partnership.

G. Each Partner hereby acknowledges that no representations as to potential profit, cash flows, funds from operations or yield, if any, in respect of the Partnership or the General Partner have been made by any Partner or any employee or representative or Affiliate of any Partner, and that projections and any other information, including, without limitation, financial and descriptive information and documentation, which may have been in any manner submitted to such Partner shall not constitute any representation or warranty of any kind or nature, express or implied.

Section 3.5 Certain ERISA Matters

Each Partner acknowledges that the Partnership is intended to qualify as a “real estate operating company” (as such term is defined in the Plan Asset Regulation). The General Partner may structure the investments in, relationships with and conduct with respect to Properties and any other assets of the Partnership so that the Partnership will be a “real estate operating company” (as such term is defined in the Plan Asset Regulation).

26

ARTICLE 4.

CAPITAL CONTRIBUTIONS

Section 4.1 Capital Contributions of the Partners

At the time of their respective execution of this Agreement, the Partners shall make or shall have made Capital Contributions as set forth in Exhibit A to this Agreement. The Partners shall own Partnership Units of the class or series and in the amounts set forth in Exhibit A and shall have a Percentage Interest in the Partnership as set forth in Exhibit A , which Percentage Interest shall be adjusted in Exhibit A from time to time by the General Partner to the extent necessary to reflect accurately exchanges, redemptions, Capital Contributions, the issuance of additional Partnership Units or similar events having an effect on a Partner’s Percentage Interest. Except as required by law, as otherwise provided in Sections 4.3 , 4.4 , 4.5 and 10.5 , or as otherwise agreed to by a Partner and the Partnership, no Partner shall be required or permitted to make any additional Capital Contributions or loans to the Partnership. Unless otherwise specified by the General Partner at the time of the creation of any class of Partnership Interests, the corresponding class or series of capital stock for any Partnership Units issued shall be REIT Shares.

Section 4.2 Loans by Third Parties

Subject to Section 4.3 , the Partnership may incur Debt, or enter into other similar credit, guarantee, financing or refinancing arrangements for any purpose (including, without limitation, in connection with any further acquisition of Properties) with any Person that is not the General Partner upon such terms as the General Partner determines appropriate; provided that , the Partnership shall not incur any Debt that is recourse to the General Partner, except to the extent otherwise agreed to by the General Partner in its sole discretion.

Section 4.3 Additional Funding and Capital Contributions

A. General . The General Partner may, at any time and from time to time determine that the Partnership requires additional funds (“ Additional Funds ”) for the acquisition of additional Properties or for such other Partnership purposes as the General Partner may determine. Additional Funds may be raised by the Partnership, at the election of the General Partner, in any manner provided in, and in accordance with, the terms of this Section 4.3 . No Person shall have any preemptive, preferential or similar right or rights to subscribe for or acquire any Partnership Interest, except as set forth in this Section 4.3 .

B. Issuance of Additional Partnership Interests . The General Partner, in its sole and absolute discretion, may raise all or any portion of the Additional Funds by accepting additional Capital Contributions of cash. The General Partner may also accept additional Capital Contributions of real property or any other non-cash assets. In connection with any such additional Capital Contributions (of cash or property), the General Partner is hereby authorized to cause the Partnership from time to time to issue to Partners (including the General Partner) or other Persons (including, without limitation, in connection with the contribution of tangible or intangible property, services, or other consideration permitted by the Act to the Partnership) additional Partnership Units or other Partnership Interests, which may be Common Units or other

27

Partnership Units issued in one or more classes, or one or more series of any of such classes, with such designations, preferences and relative, participating, optional, conversion, exchange or other special rights, powers, and duties, including rights, powers, and duties senior to then existing Limited Partner Interests, all as shall be determined by the General Partner in its sole and absolute discretion subject to Maryland law, including without limitation, (i) the allocations of items of Partnership income, gain, loss, deduction, and credit to such class or series of Partnership Interests; (ii) the right of each such class or series of Partnership Interests to share in Partnership distributions; (iii) the rights of each such class or series of Partnership Interests upon dissolution and liquidation of the Partnership; and (iv) the right to vote, including, without limitation, the Limited Partner approval rights set forth in Section 11.2.A ; provided , that no such additional Partnership Units or other Partnership Interests shall be issued to the General Partner unless either (a) (1) the additional Partnership Interests are issued in connection with the grant, award, or issuance of shares of the General Partner pursuant to Section 4.3.C below, which shares have designations, preferences, and other rights (except voting rights) such that the economic interests attributable to such shares are substantially similar to the designations, preferences and other rights of the additional Partnership Interests issued to the General Partner in accordance with this Section 4.3.B , and (2) the General Partner shall make a Capital Contribution to the Partnership in an amount equal to any net proceeds raised in connection with such issuance, or (b) the additional Partnership Interests are issued to all Partners holding Partnership Interests in the same class in proportion to their respective Percentage Interests in such class or (c) the additional Partnership Interests are issued pursuant to a Stock Plan. The General Partner’s determination that consideration is adequate shall be conclusive insofar as the adequacy of consideration relates to whether the Partnership Interests are validly issued and paid. In the event that the Partnership issues additional Partnership Interests pursuant to this Section 4.3.B , the General Partner shall make such revisions to this Agreement (including but not limited to the revisions described in Section 5.4 , Section 6.2.B , and Section 8.6 ) as it determines are necessary to reflect the issuance of such additional Partnership Interests.

C. Issuance of REIT Shares or Other Securities by the General Partner . Except as provided in the next following paragraph of this Section 4.3C , the General Partner shall not issue any additional REIT Shares, other shares of capital stock of the General Partner or New Securities (other than REIT Shares issued pursuant to Section 8.6 or such shares, stock or securities pursuant to a dividend or distribution (including any stock split) to all of its stockholders or all of its stockholders who hold a particular class of stock of the General Partner), unless (i) the General Partner shall cause the Partnership to issue to the General Partner, Partnership Interests or rights, options, warrants or convertible or exchangeable securities of the Partnership having designations, preferences and other rights, all such that the economic interests thereof are substantially similar to those of the REIT Shares, other shares of capital stock of the General Partner or New Securities issued by the General Partner and (ii) the General Partner shall make a Capital Contribution of any net proceeds from the issuance of such additional REIT Shares, other shares of capital stock or New Securities, as the case may be, and from any exercise of the rights contained in such additional New Securities, as the case may be. Without limiting the foregoing, the General Partner is expressly authorized to issue REIT Shares, other shares of capital stock of the General Partner or New Securities for no tangible value or for less than fair market value, and the General Partner is expressly authorized to cause the Partnership to issue to the General Partner corresponding Partnership Interests, so long as (x) the General Partner concludes in good faith that such issuance of Partnership Interests is in the interests of the Partnership; and (y) the General Partner contributes all proceeds, if any, from such issuance and exercise to the Partnership.

28

In connection with the General Partner’s initial public offering of REIT Shares, any other issuance of REIT Shares, other capital stock of the General Partner or New Securities, the General Partner shall contribute to the Partnership, any net proceeds raised in connection with such issuance; provided , that the General Partner may use a portion of the net proceeds from any offering to acquire Partnership Units or other assets ( provided such other assets are contributed to the Partnership pursuant to the terms of this Agreement); and provided , further , that if the net proceeds actually received by the General Partner are less than the gross proceeds of such issuance as a result of any underwriter’s discount or other expenses paid or incurred in connection with such issuance then, except to the extent such net proceeds are used to acquire Partnership Units, the General Partner shall be deemed to have made a Capital Contribution to the Partnership in the amount equal to the sum of the net proceeds of such issuance plus the amount of such underwriter’s discount and other expenses paid by the General Partner (which discount and expense shall be treated as an expense for the benefit of the Partnership for purposes of Section 7.4 ). In the case of issuance of REIT Shares by the General Partner in any offering, whether registered under the Securities Act or exempt from such registration, underwritten, offered and sold directly to investors or through agents or other intermediaries, or otherwise distributed, for purposes of determining the number of additional Common Units issuable upon a Capital Contribution funded by the net proceeds thereof consistently with the immediately preceding sentence, any discount from the then current market price of REIT Shares shall be disregarded such that an equal number of Common Units can be issued to the General Partner as the number of REIT Shares sold by the General Partner in such offering, consistently with the determination of Partners’ Percentage Interests as provided in Section 4.3.D . In the case of issuances of REIT Shares, other capital stock of the General Partner or New Securities pursuant to any Stock Plan at a discount from fair market value or for no value, the amount of such discount representing compensation to the employee, as determined by the General Partner, shall be treated as an expense for the benefit of the Partnership for purposes of Section 7.4 and, as a result, the General Partner shall be deemed to have made a Capital Contribution to the Partnership in an amount equal to the sum of any net proceeds of such issuance plus the amount of such expense.

D. Percentage Interest Adjustments in the Case of Capital Contributions for Partnership Units . Upon the acceptance of additional Capital Contributions in exchange for any class or series of Partnership Units, the Percentage Interest of each Partner in such class or series of Partnership Units shall be equal to a fraction, the numerator of which is equal to the sum of (i) the Deemed Partnership Interest Value of the Partnership Interest of such Partner in respect of such class or series (computed as of the Business Day immediately preceding the Adjustment Date) and (ii) the Agreed Value of additional Capital Contributions, if any, made by such Partner to the Partnership in such class or series of Partnership Interests as of such Adjustment Date, and the denominator of which is equal to the sum of (i) the Deemed Value of the Partnership Interests of such class or series (computed as of the Business Day immediately preceding the Adjustment Date), plus (ii) the aggregate Agreed Value of additional Capital Contributions contributed by all Partners and/or third parties to the Partnership on such Adjustment Date in such class or series. Provided , however , solely for purposes of calculating a Partner’s Percentage Interest pursuant to this Section 4.3.D , (i) in the case of cash Capital Contributions by the

29

General Partner funded by an offering of REIT Shares or other shares of capital stock of the General Partner and (ii) in the case of the contribution of properties by the General Partner which were acquired by the General Partner in exchange for REIT Shares or other shares of capital stock of the General Partner immediately prior to such contribution, the General Partner shall be issued a number of Partnership Units equal and corresponding to the number of such shares issued by the General Partner in exchange for such cash or Properties, the Partnership Units held by the other Partners shall not be adjusted, and the Partners’ Percentage Interests shall be adjusted accordingly. The General Partner shall promptly give each Partner written notice of its Percentage Interest, as adjusted. This Section 4.3.D shall not apply to the issuance of Profits Interest Units, which shall be governed by Section 4.5 , and the General Partner may adjust Percentage Interests in a manner that is different from the provisions of this Section 4.3.D to the extent it reasonably determines it is appropriate to do so to reflect the value of the respective Capital Contributions made to the Partnership and the number of Partnership Units issued with respect thereto.

Section 4.4 Other Contribution Provisions . In the event that any Partner is admitted to the Partnership and is given (or is treated as having received) a Capital Account at the time of admission in exchange for services rendered to the Partnership, such transaction shall be treated by the Partnership and the affected Partner as if the Partnership had compensated such Partner in cash, and the Partner had contributed such cash to the capital of the Partnership. In addition, with the consent of the General Partner, in its sole discretion, one or more Limited Partners may enter into agreements with the Partnership, in the form of a guarantee or contribution agreement, which have the effect of providing a guarantee of certain obligations of the Partnership.

Section 4.5 Profit Interest Units . The General Partner may from time to time issue Profits Interest Units to Persons who provide services to the Partnership, for such consideration or for no consideration as the General Partner may determine to be appropriate, and admit such Persons as Limited Partners. Subject to the following provisions of this Section 4.5 and the special provisions of Sections 4.3.D, 6.2.C, 8.7, 8.8 and Article 18 , Profits Interest Units shall be treated as Common Units, with all of the rights, privileges and obligations attendant thereto. Subject to Section 18.2.A(4) , for purposes of computing the Partners’ Percentage Interests, Profits Interest Units shall be treated as Common Units. In particular, the Partnership shall maintain at all times a one-to-one correspondence between Profits Interest Units and Common Units for conversion, distribution and other purposes, including without limitation complying with the following procedures:

A. If an Adjustment Event occurs, then the General Partner shall make a corresponding adjustment to the Profits Interest Units to maintain a one-for-one conversion and economic equivalence ratio between Common Units and Profits Interest Units. The following shall be “ Adjustment Events ”: (i) the Partnership makes a distribution on all outstanding Common Units in Partnership Units, (ii) the Partnership subdivides the outstanding Common Units into a greater number of units or combines the outstanding Common Units into a smaller number of units, or (iii) the Partnership issues any Partnership Units in exchange for its outstanding Common Units by way of a reclassification or recapitalization of its Common Units. If more than one Adjustment Event occurs, the adjustment to the Profits Interest Units need be made only once using a single formula that takes into account each and every Adjustment Event as if all Adjustment Events occurred simultaneously. For the avoidance of doubt, the following

30

shall not be Adjustment Events: (x) the issuance of Partnership Units in a financing, reorganization, acquisition or other similar business transaction, (y) the issuance of Partnership Units pursuant to any employee benefit or compensation plan or distribution reinvestment plan, or (z) the issuance of any Partnership Units to the Company in respect of a Capital Contribution to the Partnership of proceeds from the sale of securities by the Company. If the Partnership takes an action affecting the Common Units other than actions specifically described above as “Adjustment Events” and in the opinion of the General Partner such action would require an adjustment to the Profits Interest Units to maintain the one-to-one correspondence described above, the General Partner shall have the right to make such adjustment to the Profits Interest Units, to the extent permitted by law and by any applicable Stock Plan or other compensatory arrangement or incentive program pursuant to which Profits Interest Units are issued, in such manner and at such time as the General Partner, in its sole discretion, may determine to be reasonably appropriate under the circumstances. If an adjustment is made to the Profits Interest Units as herein provided the Partnership shall promptly file in the books and records of the Partnership an officer’s certificate setting forth such adjustment and a brief statement of the facts requiring such adjustment, which certificate shall be conclusive evidence of the correctness of such adjustment absent manifest error. Promptly after filing of such certificate, the Partnership shall mail a notice to each Profits Interest Unitholder setting forth the adjustment to his or her Profits Interest Units and the effective date of such adjustment.

B. Except as otherwise provided in this Agreement (including, without limitation, Article 18 with respect the Class C Units) or by the General Partner with respect to any particular class or series of Profits Interest Units, (a) the Profits Interest Unitholders shall, in respect of each Distribution Payment Date, when, as and if authorized and declared by the General Partner out of assets legally available for that purpose, be entitled to receive distributions in an amount per Profits Interest Unit equal to the distributions per Common Unit, paid to holders of record on the same record date established by the General Partner with respect to such Distribution Payment Date; (b) references to additional Partnership Interests in Section 5.4 shall be deemed to include Profits Interest Units issued during a Distribution Period and such Section 5.4 shall apply in full to Profits Interest Units; (c) during any Distribution Period, so long as any Profits Interest Units are outstanding, no distributions (whether in cash or in kind) shall be authorized, declared or paid on Common Units, unless equal distributions have been or contemporaneously are authorized, declared and paid on the Profits Interest Units for such Distribution Period, (d), the Profits Interest Units shall rank pari passu with the Common Units as to the payment of regular and special periodic or other distributions and distribution of assets, and (e) any class or series of Partnership Units or Partnership Interests which by its terms specifies that it shall rank junior to, on a parity with, or senior to the Common Units with respect to distributions shall also rank junior to, on a parity with, or senior to, as the case may be, the Profits Interest Units. Notwithstanding the foregoing provisions of this Section 4.5.B , proceeds from a Liquidating Event shall be distributed to Holders of Partnership Units as set forth in Sections 5.3 and 13.2 . Subject to the terms of any Vesting Agreement, a Profits Interest Unitholder shall be entitled to transfer his or her Profits Interest Units to the same extent, and subject to the same restrictions as holders of Common Units are entitled to transfer their Common Units pursuant to Article 11 .

31

C. Profits Interest Units shall be subject to the following special provisions:

(a) Vesting Agreements . Profits Interest Units may, in the sole discretion of the General Partner, be issued subject to vesting, forfeiture and additional restrictions on transfer pursuant to the terms of a Vesting Agreement. The terms of any Vesting Agreement may be modified by the General Partner from time to time in its sole discretion, subject to any restrictions on amendment imposed by the relevant Vesting Agreement or by the Plan, if applicable. Profits Interest Units that were fully vested when issued or that have vested under the terms of a Vesting Agreement are referred to as “ Vested Profits Interest Units ”; all other Profits Interest Units shall be treated as “ Unvested Profits Interest Units .”

(b) Forfeiture . Unless otherwise specified in the Vesting Agreement or in any applicable Stock Plan or other compensatory arrangement or incentive program pursuant to which Profits Interest Units are issued, upon the occurrence of any event specified in such Vesting Agreement, Stock Plan, arrangement or program as resulting in either the right of the Partnership or the General Partner to repurchase Profits Interest Units at a specified purchase price or some other forfeiture of any Profits Interest Units, then if the Partnership or the General Partner exercises such right to repurchase or forfeiture or upon the occurrence of the event causing forfeiture in accordance with the applicable Vesting Agreement, Stock Plan, arrangement or program, then the relevant Profits Interest Units shall immediately, and without any further action, be treated as cancelled and no longer outstanding for any purpose. Unless otherwise specified in the applicable Vesting Agreement, Stock Plan, arrangement or program, no consideration or other payment shall be due with respect to any Profits Interest Units that have been forfeited, other than any distributions declared with respect to a Partnership Record Date and with respect to such units, prior to the effective date of the forfeiture. Except as otherwise provided in this Agreement or any agreement relating to the grant of Profits Interest Units (including each Class C Units Agreement), in connection with any repurchase or forfeiture of such units, the balance of the portion of the Capital Account of the Profits Interest Unitholder that is attributable to all of his or her Profits Interest Units shall be reduced by the amount, if any, by which it exceeds the target balance contemplated by Section 6.2.C , calculated with respect to the Profits Interest Unitholder’s remaining Profits Interest Units, if any.

(c) Allocations . Profits Interest Unitholders shall be entitled to certain special allocations of gain under Section 6.2.C .

(d) Redemption . The Redemption Right provided to Limited Partners under Section 8.6 shall not apply with respect to Profits Interest Units unless and until they are converted to Partnership Units as provided in clause (f) below and Section 8.7 .

(e) Legend . Any certificate evidencing an Profits Interest Unit shall bear an appropriate legend indicating that additional terms, conditions and restrictions on transfer, including without limitation any Vesting Agreement, apply to the Profits Interest Unit.

(f) Conversion to Partnership Units . Vested Profits Interest Units are eligible to be converted into Partnership Units under Section 8.7 .

32

(g) Voting . Profits Interest Units shall have the voting rights provided in Section 8.8 .

Section 4.6 No Preemptive Rights

Except to the extent expressly granted by the Partnership pursuant to another agreement, no Person shall have any preemptive, preferential or other similar right with respect to (i) additional Capital Contributions or loans to the Partnership or (ii) issuance or sale of any Partnership Units or other Partnership Interests.

ARTICLE 5.

DISTRIBUTIONS

Section 5.1 Requirement and Characterization of Distributions

The General Partner shall cause the Partnership to distribute quarterly all, or such portion as the General Partner may in its discretion determine, of Available Cash generated by the Partnership to the Partners who are Partners on the applicable Partnership Record Date with respect to such distribution, (1) first, with respect to any class or series of Partnership Interests that are entitled to any preference in distributions, in accordance with the rights of such class or series of Partnership Interests (and within such class or series, pro rata in proportion to the respective Percentage Interests on the applicable Partnership Record Date), and (2) second, with respect to any class or series of Partnership Interests that are not entitled to any preference in distributions, pro rata to each such class or series in accordance with the terms of such class or series to the Partners who are Partners of such class or series on the Partnership Record Date with respect to such distribution (and within each such class or series, pro rata in proportion to the respective Percentage Interests on such Partnership Record Date). Unless otherwise expressly provided for herein or in an agreement, if any, entered into in connection with the creation of a new class or series of Partnership Interests created in accordance with Article 4 , no Partnership Interest shall be entitled to a distribution in preference to any other Partnership Interest. The General Partner shall take such reasonable efforts, as determined by it in its sole and absolute discretion and consistent with its qualification as a REIT, to cause the Partnership to distribute sufficient amounts to enable the General Partner, for so long as the General Partner has determined to qualify as a REIT, to pay stockholder dividends that will (a) satisfy the requirements for qualifying as a REIT under the Code and Regulations (“ REIT Requirements ”), and (b) except to the extent otherwise determined by the General Partner, avoid the imposition of any federal income or excise tax liability on the General Partner, except to the extent that a distribution pursuant to clause (b) would prevent the Partnership from making a distribution to the Holders of Series A Preferred Units in accordance with Section 16.2 or Series B Preferred Units in accordance with Section 17.2 or Series C Preferred Units in accordance with Section 19.2 .

Section 5.2 Distributions in Kind

Except as expressly provided herein, no right is given to any Partner to demand and receive property other than cash. The General Partner may determine, in its sole and absolute discretion, to make a distribution in-kind to the Partners of Partnership assets, and such assets shall be distributed in such a fashion as to ensure that the fair market value is distributed and allocated in accordance with Articles 5 , 6 and 10 .

33

Section 5.3 Distributions Upon Liquidation

Notwithstanding Section 5.1 , proceeds from a Liquidating Event shall be distributed to the Partners in accordance with Section 13.2 .

Section 5.4 Distributions to Reflect Issuance of Additional Partnership Interests

In the event that the Partnership issues additional Partnership Interests to the General Partner or any Additional Limited Partner pursuant to Section 4.3.B , 4.3.C or 4.5 , the General Partner shall make such revisions to this Article 5 as it determines are necessary to reflect the issuance of such additional Partnership Interests. In the absence of any agreement to the contrary, an Additional Limited Partner shall be entitled to the distributions set forth in Section 5.1 (without regard to this Section 5.4 ) with respect to the period during which the closing of its contribution to the Partnership occurs, multiplied by a fraction the numerator of which is the number of days from and after the date of such closing through the end of the applicable period, and the denominator of which is the total number of days in such period.

ARTICLE 6.

ALLOCATIONS

Section 6.1 Timing and Amount of Allocations of Net Income and Net Loss

Net Income and Net Loss of the Partnership shall be determined and allocated with respect to each Partnership Year of the Partnership as of the end of each such year. Subject to the other provisions of this Article 6 , an allocation to a Partner of a share of Net Income or Net Loss shall be treated as an allocation of the same share of each item of income, gain, loss or deduction that is taken into account in computing Net Income or Net Loss.

Section 6.2 General Allocations

Except as otherwise provided in this Article 6 , Net Income and Net Loss allocable with respect to a class of Partnership Interests shall be allocated to each of the Holders holding such class of Partnership Interests in accordance with their respective Percentage Interest of such class.

A. Allocation of Net Income and Net Losses .

(1) Net Income . Except as otherwise provided in Section 6.3 , Net Income for any Partnership Year shall be allocated to the Partners in the following manner and order of priority:

(a) First , to the General Partner in an amount equal to the remainder, if any, of the cumulative Net Losses allocated to the General Partner pursuant to Section 6.2.A.2(d) for all prior Partnership Years minus the cumulative Net Income allocated to the General Partner pursuant to this Section 6.2.A.(1)(a) for all prior Partnership Years;

34

(b) Second , to each Limited Partner in an amount equal to the remainder, if any, of the cumulative Net Losses allocated to each such Limited Partner pursuant to Section 6.2.A.2(c) for all prior Partnership Years minus the cumulative Net Income allocated to such Limited Partner pursuant to this Section 6.2.A.(1)(b) for all prior Partnership Years;

(c) Third , to the General Partner in an amount equal to the remainder, if any, of the cumulative Net Losses allocated to the General Partner pursuant to Section 6.2.A.2(b) for all prior Partnership Years minus the cumulative Net Income allocated to such Partner pursuant to this Section 6.2.A.1(c) for all prior Partnership Years;

(d) Fourth , to the General Partner in an amount equal to the sum of (i) the excess of the cumulative Series A Priority Return on the Series A Preferred Units to the last day of the current Partnership Year or to the date of redemption of the Series A Preferred Units, to the extent such Series A Preferred Units are redeemed during such year, over the cumulative Net Income allocated to the General Partner pursuant to this clause (i)  of this Section 6.2.A.1(d) for all prior Partnership Years, (ii) the excess of the cumulative Series B Priority Return on the Series B Preferred Units to the last day of the current Partnership Year or to the date of redemption of the Series B Preferred Units, to the extent such Series B Preferred Units are redeemed during such year over the cumulative Net Income allocated to the General Partner pursuant to this clause (ii)  of this Section 6.2.A.1(d) for all prior Partnership Years and (iii) the excess of the cumulative Series C Priority Return on the Series C Preferred Units to the last day of the current Partnership Year or to the date of redemption or conversion of the Series C Preferred Units, to the extent such Series C Preferred Units are redeemed or converted during such year, provided that in connection with any conversion of a Series C Preferred Units, the General Partner shall be permitted to make allocations of income with respect to such Series C Preferred Units that are consistent with the distributions payable with respect to such Series C Preferred Units, over the cumulative Net Income allocated to the General Partner pursuant to this clause (iii)  of this Section 6.2.A.1(d) for all prior Partnership Years;

(e) Fifth, to the General Partner and the Limited Partners in an amount equal to the remainder, if any, of the cumulative Net Losses allocated to each such Partner pursuant to Section 6.2.A.2(a) for all prior Partnership Years minus the cumulative Net Income allocated to each Partner pursuant to this Section 6.2.A.(1)(e) for all prior Partnership Years; and

(f) Sixth , to each of the Partners in accordance with their respective Percentage Interests in the Common-Equivalent Units.

To the extent the allocations of Net Income set forth above in any paragraph of this Section 6.2.A.(1) are not sufficient to entirely satisfy the allocation set forth in such paragraph, such allocation shall be made in proportion to the total amount that would have been allocated pursuant to such paragraph without regard to such shortfall.

35

(2) Net Losses . Except as otherwise provided in Section 6.3 , Net Losses for any Partnership Year shall be allocated to the Partners in the following manner and order of priority:

(a) First , to the General Partner and the Limited Partners in accordance with their respective Percentage Interests in the Common-Equivalent Units (to the extent consistent with this Section 6.2.A(2)(a) ) until the Adjusted Capital Account Balance (ignoring for this purpose any amounts a Partner is obligated to contribute to the capital of the Partnership or is deemed obligated to contribute pursuant to Regulations Section 1.704-1(b)(2)(ii)(c)(2) and ignoring the General Partner’s Series A Preferred Capital, Series B Preferred Capital and Series C Preferred Capital) of each such Partner is zero;

(b) Second , to the General Partner (ignoring for this purpose any amounts the General Partner is obligated to contribute to the capital of the Partnership or is deemed obligated to contribute pursuant to Regulations Section 1.704-1(b)(2)(ii)(c)(2)), until the Adjusted Capital Account (as so modified) of the General Partner is zero;

(c) Third, to the Limited Partners to the extent of, and in proportion to, the positive balance (if any) in their Adjusted Capital Accounts; and

(d) Fourth, to the General Partner.

B. Allocations to Reflect Issuance of Additional Partnership Interests . In the event that the Partnership issues additional Partnership Interests to the General Partner, a Limited Partner or any Additional Limited Partner pursuant to Section 4.3 , the General Partner shall make such revisions to this Section 6.2 as it determines are necessary to reflect the terms of the issuance of such additional Partnership Interests, including making preferential allocations to certain classes of Partnership Interests, subject to the terms of the Series A Preferred Units, the Series B Preferred Units and the Series C Preferred Units, in accordance with any method selected by the General Partner.

C. Special Allocation of Gain to Profits Interest Unitholders . Notwithstanding the allocations set forth in Section 6.2.A(1) above, any net capital gains realized in connection with the actual or hypothetical sale of all or substantially all of the assets of the Partnership, including but not limited to net capital gain treated as realized in connection with an adjustment to the Gross Asset Value of Partnership assets as set forth in the definition of such term, shall first be allocated to the Profits Interest Unitholders until the Economic Capital Account Balances of such Limited Partners, to the extent attributable to their ownership of Profits Interest Units, are equal to (i) the Common Unit Economic Balance, multiplied by (ii) the number of their Profits Interest Units. For this purpose, the “ Economic Capital Account Balances ” of the Profits Interest Unitholders will be equal to their Capital Account balances, plus the amount of their shares of any Partner Minimum Gain or Partnership Minimum Gain, in each case to the extent attributable to their ownership of Profits Interest Units. Similarly, the “ Common Unit Economic Balance ” shall mean (i) the Capital Account balance of the Company, plus the amount of the Company’s share of any Partner Minimum Gain or Partnership Minimum Gain, in either case to the extent attributable to the Company’s ownership of Common Units and computed on a hypothetical basis after taking into account all allocations through the date on which any allocation is made

36

under this Section 6.2.C , divided by (ii) the number of the Company’s Common Units. Any such allocations shall be made among the Profits Interest Unitholders in proportion to the amounts required to be allocated to each under this Section 6.2.C . The parties agree that the intent of this Section 6.2.C is to make the Capital Account balances of the Profits Interest Unitholders with respect to their Profits Interest Units economically equivalent to the Capital Account balance of the Company with respect to its Common Units.

D. Allocations in Connection with a Liquidating Event . Except as otherwise provided in Section 6.3, the allocations of Net Income and Net Loss set forth in the foregoing provisions of this Section 6.2 or, if necessary, allocations of individual items of income, gain, loss and deduction which comprise such Net Income or Net Loss, shall be adjusted to the extent necessary so as to result in the Capital Account balance of each Partner being such that distributions to the Partners pursuant to Section 13.2 upon the occurrence of a Liquidating Event shall be made first to the General Partner in an amount equal to the sum of the Series A Preferred Capital, the Series B Preferred Capital and the Series C Preferred Capital, and thereafter to Holders of Common-Equivalent Units in accordance with their Percentage Interests in such Units.

Section 6.3 Additional Allocation Provisions

Notwithstanding the foregoing provisions of this Article 6 :

A. Regulatory Allocations .

(i) Minimum Gain Chargeback . Except as otherwise provided in Regulations Section 1.704-2(f), notwithstanding the provisions of Section 6.2 , or any other provision of this Article 6 , if there is a net decrease in Partnership Minimum Gain during any Partnership Year, each Holder shall be specially allocated items of Partnership income and gain for such year (and, if necessary, subsequent years) in an amount equal to such Holder’s share of the net decrease in Partnership Minimum Gain, as determined under Regulations Section 1.704-2(g). Allocations pursuant to the previous sentence shall be made in proportion to the respective amounts required to be allocated to each Holder pursuant thereto. The items to be allocated shall be determined in accordance with Regulations Sections 1.704-2(f)(6) and 1.704-2(j)(2). This Section 6.3.A(i) is intended to qualify as a “minimum gain chargeback” within the meaning of Regulation Section 1.704-2(f) which shall be controlling in the event of a conflict between such Regulation and this Section 6.3.A(i) .

(ii) Partner Minimum Gain Chargeback . Except as otherwise provided in Regulations Section 1.704-2(i)(4), and notwithstanding the provisions of Section 6.2 , or any other provision of this Article 6 (except Section 6.3.A(i) ), if there is a net decrease in Partner Minimum Gain attributable to a Partner Nonrecourse Debt during any Partnership Year, each Holder who has a share of the Partner Minimum Gain attributable to such Partner Nonrecourse Debt, determined in accordance with Regulations Section 1.704-2(i)(5), shall be specially allocated items of Partnership income and gain for such year (and, if necessary, subsequent years) in an amount equal to such Holder’s share of the net decrease in Partner Minimum Gain attributable to such Partner Nonrecourse Debt, determined in accordance with Regulations Section 1.704-2(i)(4). Allocations pursuant to the previous sentence shall be made

37

in proportion to the respective amounts required to be allocated to each Holder pursuant thereto. The items to be so allocated shall be determined in accordance with Regulations Sections 1.704-2(i)(4) and 1.704-2(j)(2). This Section 6.3.A(ii) is intended to qualify as a “chargeback of partner nonrecourse debt minimum gain” within the meaning of Regulation Section 1.704-2(i) which shall be controlling in the event of a conflict between such Regulation and this Section 6.3.A(ii) .

(iii) Nonrecourse Deductions and Partner Nonrecourse Deductions . Any Nonrecourse Deductions for any Partnership Year shall be specially allocated to the Holders in accordance with their respective Percentage Interests in Common-Equivalent Units. Any Partner Nonrecourse Deductions for any Partnership Year shall be specially allocated to the Holder(s) who bears the economic risk of loss with respect to the Partner Nonrecourse Debt to which such Partner Nonrecourse Deductions are attributable, in accordance with Regulations Sections 1.704-2(b)(4) and 1.704-2(i).

(iv) Qualified Income Offset . If any Holder unexpectedly receives an adjustment, allocation or distribution described in Regulations Section 1.704-1(b)(2)(ii)(d)(4), (5) or (6), items of Partnership income and gain shall be allocated, in accordance with Regulations Section 1.704-1(b)(2)(ii)(d), to the Holder in an amount and manner sufficient to eliminate, to the extent required by such Regulations, the Adjusted Capital Account Deficit of the Holder as quickly as possible provided that an allocation pursuant to this Section 6.3.A(iv) shall be made if and only to the extent that such Holder would have an Adjusted Capital Account Deficit after all other allocations provided in this Article 6 have been tentatively made as if this Section 6.3.A(iv) were not in this Agreement. It is intended that this Section 6.3.A(iv) qualify and be construed as a “qualified income offset” within the meaning of Regulations 1.704-1(b)(2)(ii)(d), which shall be controlling in the event of a conflict between such Regulations and this Section 6.3.A(iv) .

(v) Gross Income Allocation . In the event any Holder has a deficit Capital Account at the end of any Partnership Year which is in excess of the sum of (1) the amount (if any) such Holder is obligated to restore to the Partnership, and (2) the amount such Holder is deemed to be obligated to restore pursuant to Regulations Section 1.704-1(b)(2)(ii)(c) or the penultimate sentences of Regulations Sections 1.704-2(g)(1) and 1.704-2(i)(5), each such Holder shall be specially allocated items of Partnership income and gain in the amount of such excess as quickly as possible, provided , that an allocation pursuant to this Section 6.3.A(v) shall be made if and only to the extent that such Holder would have a deficit Capital Account in excess of such sum after all other allocations provided in this Article 6 have been tentatively made as if this Section 6.3.A(v) and Section 6.3.A(iv) were not in this Agreement.

(vi) Limitation on Allocation of Net Loss . To the extent any allocation of Net Loss would cause or increase an Adjusted Capital Account Deficit as to any Holder, such allocation of Net Loss shall be reallocated among the other Holders in accordance with their respective Percentage Interests in Common-Equivalent Units subject to the limitations of this Section 6.3.A(vi) .

38

(vii) Section 754 Adjustment . To the extent an adjustment to the adjusted tax basis of any Partnership asset pursuant to Code Section 734(b) or Code Section 743(b) is required, pursuant to Regulations Section 1.704-1(b)(2)(iv)(m)(2) or Regulations Section 1.704-1(b)(2)(iv)(m)(4), to be taken into account in determining Capital Accounts as the result of a distribution to a Holder in complete liquidation of his interest in the Partnership, the amount of such adjustment to the Capital Accounts shall be treated as an item of gain (if the adjustment increases the basis of the asset) or loss (if the adjustment decreases such basis) and such gain or loss shall be specially allocated to the Holders in accordance with their interests in the Partnership in the event that Regulations Section 1.704-1(b)(2)(iv)(m)(2) applies, or to the Holders to whom such distribution was made in the event that Regulations Section 1.704-1(b)(2)(iv)(m)(4) applies.

(viii) Curative Allocation . The allocations set forth in Sections 6.3.A(i) , (ii) , (iii) , (iv) , (v) , (vi) , and (vii)  (the “ Regulatory Allocations ”) are intended to comply with certain regulatory requirements, including the requirements of Regulations Sections 1.704-1(b) and 1.704-2. Notwithstanding the provisions of Sections 6.1 and 6.2 (but subject to Section 6.2.D), the Regulatory Allocations shall be taken into account in allocating other items of income, gain, loss and deduction among the Holders so that, to the extent possible, the net amount of such allocations of other items and the Regulatory Allocations to each Holder shall be equal to the net amount that would have been allocated to each such Holder if the Regulatory Allocations had not occurred.

B. For purposes of determining a Holder’s proportional share of the “excess nonrecourse liabilities” of the Partnership within the meaning of Regulations Section 1.752-3(a)(3), each Holder’s interest in Partnership profits shall be such Holder’s Percentage Interest in Common-Equivalent Units.

Section 6.4 Tax Allocations

A. In General . Except as otherwise provided in this Section 6.4 , for income tax purposes each item of income, gain, loss and deduction (collectively, “ Tax Items ”) shall be allocated among the Holders in the same manner as its correlative item of “book” income, gain, loss or deduction is allocated pursuant to Sections 6.2 and 6.3 .

B. Allocations Respecting Section 704(c) Revaluations . Notwithstanding Section 6.4.A , Tax Items with respect to Partnership property that is contributed to the Partnership by a Partner shall be shared among the Holders for income tax purposes pursuant to Regulations promulgated under Section 704(c) of the Code, so as to take into account the variation, if any, between the basis of the property to the Partnership and its initial Gross Asset Value. With respect to Partnership property that is contributed to the Partnership in connection with the General Partner’s initial public offering or pursuant to the Partnership’s exercise of rights under any Option Agreement or ROFO Agreement, such variation between basis and initial Gross Asset Value shall be taken into account under the “traditional method” as described in Regulations Section 1.704-3(b). With respect to other properties contributed to the Partnership, the Partnership shall account for such variation un