Rule13a-14(d)/15d-14(d) Certifications.

 

I,Helaine M. Kaplan, certify that:

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| 1.     | I have reviewed this report on  Form 10-K and all reports on Form 10-D required to be filed in respect of the  period covered by this report on Form 10-K of the COMM 2015-CCRE23 Mortgage  Trust (the "Exchange Act periodic reports");                                                                                                                                                                                                                                                                                                                              |
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| 2.     | Based on my knowledge, the Exchange  Act periodic reports, taken as a whole, do not contain any untrue statement  of a material fact or omit to state a material fact necessary to make the  statements made, in light of the circumstances under which such statements  were made, not misleading with respect to the period covered by this report;                                                                                                                                                                                                                           |
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| 3.     | Based on my knowledge, all  of the distribution, servicing and other information required to be provided  under Form 10-D for the period covered by this report is included in the  Exchange Act periodic reports;                                                                                                                                                                                                                                                                                                                                                              |
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| 4.     | Based on my knowledge and  the servicer compliance statements required in this report under Item 1123 of  Regulation AB, and except as disclosed in the Exchange Act periodic reports, the  servicers have fulfilled their obligations under the servicing agreements in  all material respects; and                                                                                                                                                                                                                                                                            |
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| 5.     | All of the reports on  assessment of compliance with servicing criteria for asset-backed securities and  their related attestation reports on assessment of compliance with servicing  criteria for asset-backed securities required to be included in this report  in accordance with Item 1122 of Regulation AB and Exchange Act Rules 13a-18  and 15d-18 have been included as an exhibit to this report, except as  otherwise disclosed in this report. Any material instances of noncompliance  described in such reports have been disclosed in this report on Form 10-K. |
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In givingthe certifications above, I have reasonably relied on information provided tome by the following unaffiliated parties:Midland Loan Services, a Division of PNC Bank, National Association, as MasterServicer, CWCapital Asset Management LLC, as Special Servicer, WilmingtonTrust, National Association, as Trustee, Wells Fargo Bank, NationalAssociation, as Certificate Administrator, Wells Fargo Bank, NationalAssociation, as Custodian, Pentalpha Surveillance LLC, as Operating Advisor,Berkeley Point Capital LLC, as Primary Servicer, Wells Fargo Bank, NationalAssociation, as Primary Servicer for the Walgreens Portfolio Mortgage Loan,Rialto Capital Advisors, LLC , as Special Servicer for the Walgreens PortfolioMortgage Loan, Wilmington Trust, National Association, as Trustee for theWalgreens Portfolio Mortgage Loan, Wells Fargo Bank, National Association, asCertificate Administrator for the Walgreens Portfolio Mortgage Loan, WellsFargo Bank, National Association, as Custodian for the Walgreens PortfolioMortgage Loan, TriMont Real Estate Advisors, Inc., as Trust Advisor for theWalgreens Portfolio Mortgage Loan, CoreLogic Commercial Real Estate Services,Inc., as Servicing Function Participant for the Walgreens Portfolio MortgageLoan, National Tax Search, LLC, as Servicing Function Participant for theWalgreens Portfolio Mortgage Loan, Wells Fargo Bank, National Association, asPrimary Servicer for the La Gran Plaza Mortgage Loan, LNR Partners, LLC, asSpecial Servicer for the La Gran Plaza Mortgage Loan, Wilmington Trust,National Association, as Trustee for the La Gran Plaza Mortgage Loan, WellsFargo Bank, National Association, as Certificate Administrator for the La GranPlaza Mortgage Loan, Wells Fargo Bank, National Association, as Custodian forthe La Gran Plaza Mortgage Loan, Park Bridge Lender Services LLC, as OperatingAdvisor for the La Gran Plaza Mortgage Loan, CoreLogic Commercial Real EstateServices, Inc., as Servicing Function Participant for the La Gran PlazaMortgage Loan, and National Tax Search, LLC, as Servicing Function Participantfor the La Gran Plaza Mortgage Loan.

 

Dated: March 20, 2017

 

/s/Helaine M. Kaplan

President

(senior officer in charge ofsecuritization of the depositor)