Hi, </o> We have a small issue with a certificate installed on the server. We have a WCF service http://simpology.org/SimpologyCMSServices/MessageService.svc The issue is that I think the IIS process does not have correct ACL on the certificate because I keep getting this error: </o> ---------------- </o> Server Error in '/SimpologyCMSServices' Application. </o> Keyset does not exist </o> Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. </o> Exception Details: System.Security.Cryptography.CryptographicException: Keyset does not exist </o> ---------------- </o> </o> Can someone please check the access rights to the certificate for the user that IIS process is using(usually Network Authority/NetworkService). </o> </o> </o> Thank you, </o> George Barbu Simpology