MP Control Manager Detected User Service is not Responding to HTTP Requests. The HTTP status code and text is 12175, . Message ID: 5490 Source: SMS Server Component: SMS_MP_Control_Manager

 This error was encountered on a MECM Management Point using PKI certificates for IBCM. The cause of the error was discovered to be an expired certificate. 

Open CERTLM (Certificates - Local Computer\Personal\Certificates) and review expiration date for all listed certificates. Reissue any expired certificates and import.