Requesting certificates via Certificate Enrollment Web Service (CES) fails with error code "ERROR_WINHTTP_NAME_NOT_RESOLVED".

Assume the following scenario:

  • You try to request a certificate via a Certificate Enrollment Web Service (CEP) from an Active Directory-integrated certification authority (Enterprise Certification Authority).
  • The operation fails with the following error message:
Certificate Request Processor: The server name or address could not be resolved 0x80072ee7 (WinHttp: 12007 ERROR_WINHTTP_NAME_NOT_RESOLVED)

The Certificate Enrollment Web Services (Certificate Enrollment Policy Web Service, CEP, and Certificate Enrollment Web Service, CES) enable the automatic request and renewal of certificates from a certification authority via a Web-based interface. This eliminates the need to contact the certification authority directly via Remote Procedure Call (RPC). For a more detailed description, see the article "Certificate request basics via Certificate Enrollment Web Services (CEP, CES)„.

Possible causes

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Possible causes can be:

  • The CES server cannot be resolved via the Domain Name System (DNS).
  • This can also happen if the address of the CES was entered or stored incorrectly.
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