I have 4 domain controllers and they are as follows:
DC1 Windows 2003 R2
DC2 Windows 2003 R2
DC3 Windows 2008 R2 (ALL FSMO roles here)
DC4 Windows 2008 R2
Ironically, I was preparing to DCPromo DC1 out of the network later today and attempted to logon via RDP and check it out first. I couldn't connect. Turns out I can't do anything with DC1 but ping it.
I went to DC3 and ran repadmin /replsummary and see all 4 DCs come back. DC2, DC3, and DC4 have a largest delta of about 50 minutes and no fails.
On the other hand, DC1 has a delta of 14d.13h:52m:43s, 10 fails, error (1727) the remote procedure call failed and did not execute.
Now, I have to decide whether to shut this server down dirty and power it back up - OR - just turn it off and rip it out of Active Directory manually. Either way, it is getting retired, but I'd love to do it gracefully via DCPromo.
If I reboot this thing, is it going to mess up my other 3 DC's since it is has been off-line for so long?