Certificate Enrolment – URI This ID conflicts with an Existing ID

KB ID 0001248


When attempting to connect a host to a Certificate Enrolment Policy Server I got this error;

URI Conflict

The URI Entered above had ID : “{Random-GUID}”. This ID conflict with an existing ID


On your certificate enrolment policy server, open the Internet Information Servers (IIS) Management console. Expand {Server-Name} > Sites > Default Web Site > ADPolicyProvider_CEP_Kerberos, (yours may not end with kerberos) > Application Settings.


Open the ID field, and add a character to the end of it > OK.


Open an Administrative Command Window > Issue an IISRESET command.

Restart IIS

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Author: PeteLong

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  1. Thanks, I had the same problem and changing the last Digit made it work.

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