This is a RODC MS Standard 2008 R2 server.
Automatic certificate enrollment for domain\user failed (0x8007003a) The specified server cannot perform the requested operation.
This is different than the Event ID 6 for RPC availability.
I have checked the certs and they appear fine but not sure if I am missing something.
Any help would be great because it is the RODC in my DMZ so many services outside rely on it for auth.