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

Charles White 21 Reputation points
2021-03-11T15:03:51.423+00:00

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.

76758-image.png

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

Active Directory
Active Directory
A set of directory-based technologies included in Windows Server.
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  1. Charles White 21 Reputation points
    2021-03-16T16:16:20.09+00:00

    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

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  2. Fan Fan 15,321 Reputation points Microsoft Vendor
    2021-03-17T02:50:29.843+00:00

    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,

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  3. Charles White 21 Reputation points
    2021-03-23T13:58:12.793+00:00

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

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

    Charles