Hello,
I am pretty new to AD. I have two Windows 2008 R2 servers running as domain controller and DNS server. There is also one more Windows 2008 R2 machine which is only certificate authority. The first server I installed as DC (and DNS) displays following errors below every 8 hours in event viewer.
"Event ID: 6, Source: CertificateServicesClient-AutoEnrollment
Automatic certificate enrollment for local system failed (0x800706ba). The RPC server is unavailable."
"Event ID: 13, Source: CertificateServicesClient-CertEnroll
Certificate enrollment for Local system failed to enroll for a DomainController certificate with request ID N/A from CertificateAuthority.mydomain.net\mydomain-CertificateAuthority-CA (The RPC server is unavailable 0x800706ba (WIN32: 1722))."
However, the second DC is running without displaying any error, seems there is no problem on certificate enrollment.
The first DC with issue also displays following error message:
"Event ID: 10009, Source: DistributedCOM
DCOM was unable to communicate with the computer CertificateAuthority.mydomain.net using any of the configured protocols."
This implies me that first DC cannot communicate with the CA, but I can successfully Ping CA from that DC. Even thought, I enabled "COM+ Network Access (DCOM-In) Windows firewall rule (although which is not enabled on the second DC), but still receiving DCOM error (10009) at the same time with the other two (6 and 13) every 8 hours.
Can you please let me know if I miss something?
I'm also new to this forum, so if I have to use another part of the forum please let me know.
Thank you very much,
Best regards,
MarufBey