Hi, I got the following error The RPC server is unavailable. 0x800706ba (WIN32: 1722 RPC_S_SERVER_UNAVAILABLE) when I try enroll a certificate from Domain Controller to CA Server.
I was reading posts like: [https://learn.microsoft.com/en-us/answers/questions/743186/the-rpc-server-is-unavailable-0x800706ba-(win32-17](https://learn.microsoft.com/en-us/answers/questions/743186/the-rpc-server-is-unavailable-0x800706ba-(win32-17)
But nothing working for me now.

-Ping from DC to CA Server its Working and ping from CA Server to DC.
-Firewalls its turn off in both sides.
-RPC service its working and running in the DC.
From DC to CA:

Looking for the event views i found this that its the main reason about the problem

Also, I added the group "Domain Controllers" to the local group "Certificate Service DCOM Access" I saw in this post https://social.technet.microsoft.com/Forums/en-US/c0d13777-3f1b-4805-94a2-ac56f3cecbf3/r2-ad-certificate-services-running-on-dc-cant-issue-to-r2win7-clients?forum=windowsserver2008r2general
If I enroll a cert from an other machine its working correctly. (Windows 10 machine cert enroll to CA Server working correctly)

Best Regards, I hope I can fix this error because I dont know whats happens.