Running Get-ADReplicationUpToDatenessVectorTable show blank partners with old last sync.

Question

Hi all,

I am not seeing any errors when looking at the sync. But I was just doing some checking and ran across the Get-ADReplicationUpToDatenessVectorTable command. It shows me all the current domain controllers but it also shows blank ones too. I am guessing these are DCs that have been demoted and replaced throughout the years.

Why are they showing and what are they? I see no errors in the sync history or repadmin. Is this something I should be worried about? No one has said anything about them. I'm just curious.

Thank you
Charles

Answer 1

As I said above. I think they are DCs that have been demoted and replaced.

I demoted them. Removed them from the domain and did a metadata cleanup, just to make sure they are completely gone from the domain. Waited for a couple of AD replications. Then installed 2016 and promoted them to a DC.

I did reuse the Server name and ip address to keep in line with our standardization.

The repadmin command shows no errors. Everything synced withing the past 15 minutes. Shows 0 failures, 0 Last failure time, and 0 Last failure status.
On the DCDiag command I did get a couple of errors.
"The event log System on server ADDC.domain.com could not be queried, error 0x6ba "The RPC server is unavailable."
I also got a replication error over night. But replication picked back up on the next sync and appears to be fine.
But these are not consistent. So I am guessing that is a hiccup in the network.

Sorry,I have been extremely busy with other issues.

Charles

Answer 2

Hi，
If it is not a consistent problem, you may monitor the DCs for a period of time 。
For the Active Directory replication error 1722: The RPC server is unavailable, you can refer to the following link for troubleshooting.
https://learn.microsoft.com/en-us/troubleshoot/windows-server/identity/replication-error-1722-rpc-server-unavailable

Best Regards,

Answer 3

There are no 1722 errors. All the repadmin command show success.

There seem to be no issues, it just seems like an oddity.

Charles