My DC is failing with an error "A fatal error occurred when attempting to access the SSL client credential private key. The error code returned from the cryptographic module is 0x8009030d. The internal error stat is 10003. This error is what I get running DCDIAG. This error repeats 4 times.
Last night I added a commercial CERT from GoDaddy to one of my Exchange 2010 servers. That server and the Cert is working great but now our AD is complaining. I'm not sure if these are related or not. The Exchange server and the two DC's are all standalone machines.