In testing my AD Win2008 R2 -to- Win2012 R2 upgrade, I successfully added a Win2012 R2 DC to my domain. Then I demoted the Win2008 R2 DCs. That went well, with this exception:
DCDIAG is showing me DFS Replication errors (0xC0001396, 0xC000138A, and 0xC0001394) about failing to communicate with partner <Win2008 R2 DC> for replication of the Domain System Volume. Well, yeah - that isn't a DC anymore, just a member server, so it has nothing to do with the Domain System Volume anymore. But what I can't figure out is why the Win2012 server is still trying to talk to it at all, after it was gracefully demoted. I added the DFS Namespaces and DFS Replication roles to the Win2012 server (now the only DC in that domain). And under Replication, I see the Domain System Volume, but I see no references to any other server. So why did it show those errors? Note that the timestamps of the errors are immediately following the demotions; haven't see them re-occur (yet - it's only been a couple hours since I did it). Firewall is off, so it's not blocking ports. "DFSRDIAG dumpadcfg" isn't telling me anything (I think - never used this before). I see no reference to the demoted WIn2008 DC ... DFSRADMIN mem list /rgname:"Domain System Volume: shows only 1 member - the Win2012 DC. So here's my question: based on the DFRDIAG and DFRADMIN outputs, am I right in assuming that those errors mentioning the Win2008 DC are just transitory, and caused by the DC demotion? I'm thinking this is nothing to worry about. Am I right?
