DC fails to replicate after January 2022 & March 2022 Patches

Question

DC fails to replicate after January 2022 & March 2022 Patches

309ra 21

We have an issue with a DC that is Server 2016. We installed the January 2022 patch and replication started to fail. We know there was an OOB patch, but we didn't apply it. We removed the January 2022 patch and everything worked again. We decided to skip February and installed the SSU and patch for March 2022 and the same issue happened. RPC 1722 server is unavailable error.

We have other Server 2016 DC's that got the same patches and no issues. Has anyone seen this problem?

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Answer 1

Anonymous

Dcom errors should be unrelated. If replication fails there should be errors recorded in the event log. Not sure what you're seeing but you could try a non authoritative sync. If using older FRS you can follow along here.
https://support.microsoft.com/en-us/help/290762/using-the-burflags-registry-key-to-reinitialize-file-replication-servi
or for DFSR follow along here.
https://support.microsoft.com/en-us/help/2218556/how-to-force-an-authoritative-and-non-authoritative-synchronization-fo

--please don't forget to upvote and Accept as answer if the reply is helpful--

309ra 21 Reputation points

2022-03-22T17:26:29.11+00:00

I've been contemplating doing a non-authoritative sync, but don't know if it's even worth doing. What are the risks associated of doing this? There's no FSMO roles on this DC, so would it make more sense to create a new server?
Anonymous

2022-03-22T17:28:47.28+00:00

There should not be any problem or risk doing a non-authoritative sync. Another option is to demote, reboot, then promo it again assuming it has not tombstoned.

--please don't forget to upvote and Accept as answer if the reply is helpful--
Anonymous

2022-03-23T12:35:20.35+00:00

Just checking if there's any progress or updates?

--please don't forget to upvote and Accept as answer if the reply is helpful--
309ra 21 Reputation points

2022-03-23T15:17:35.46+00:00

No, it's on the back burner for now while we tackle some other things. I'll revisit this issue next week.
Anonymous

2022-03-23T15:18:47.847+00:00

Sounds good, in the mean time you could close up the thread here by marking answer.

Answer 2

Anonymous

What's in the system and DFS Replication event logs?

309ra 21 Reputation points

2022-03-22T17:14:34.627+00:00

System errors are all DistributedCOM event ID 10016 and 10028. No DFS replication errors since 2020.

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DC fails to replicate after January 2022 & March 2022 Patches

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