Hi,
I have encountered the following error while installing Certificate Authority Web enrollment:
Active Directory Certificate Services setup failed with the following error: The RPC server is unavailable. 0x800706ba (WIN32: 1722 RPC_S_SERVER_UNAVAILABLE)
This error appeared when Im trying to specify my Sub CA (which is on another server) during the installation.
I have tried to ping to the actual server (Sub CA) and it can be ping successfully from my web enrollment server. So I went to system event log of my web enrollment server and found this (Event ID 10028):
DCOM was unable to communicate with the computer (Sub CA FQDN) using any of the configured protocols; requested by PID XXX (C:\Windows\System32\wsmprovhost.exe)
Suspecting that Windows firewall might have blocked some services so I turned it off on both Sub CA and Web enrollment servers but the issue was not solved. There's no external firewalls between these 2 servers.
Went to Component Services and right click to My Computer Properties and have confirmed thatEnable Distributed COM on this computer was selected.
Have tried the command Certutil -ping on both my Sub CA and web enrollment servers respectively, Sub CA server can ping to my CA but web enrollment server shows the RPC error as shown above.
May I know is there any services or options that I should have enabled but I have missed it ?