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Marc__K's avatar
Marc__K
Brass Contributor
Mar 06, 2023
Solved

DFS Replication is Not Compatible with NTS Deduplication

The https://learn.microsoft.com/en-us/windows-server/storage/data-deduplication/interop claims that data deduplication is compatible with DFS Replication, but that is not correct.  I have several sys...
data deduplication
dfs replication
Windows Server
  • Marc__K's avatar
    Marc__K
    Jun 02, 2023

    It turns out the March 2023 CU didn't have anything to do with this.  Not previously mentioned is that the systems experiencing this problem have Veeam Agent for Windows (VAW) installed.  After recently updating VAW to a newer release, the 4406 events returned.  The last time the reboot from installing the March 2023 CU must have been what actually fixed things.  This time I did a reboot without installing any additional Windows updates and the 4406 events stopped again.

Marc__K's avatar
Marc__K
Brass Contributor
Apr 07, 2023
So...This appears to have stopped after installation of the March 2023 CU on the servers. Perhaps development already had a bug logged and happened to fix it. I know I had been troubleshooting this for a while before I posted this.
Marc__K's avatar
Marc__K
Brass Contributor
Jun 02, 2023

It turns out the March 2023 CU didn't have anything to do with this.  Not previously mentioned is that the systems experiencing this problem have Veeam Agent for Windows (VAW) installed.  After recently updating VAW to a newer release, the 4406 events returned.  The last time the reboot from installing the March 2023 CU must have been what actually fixed things.  This time I did a reboot without installing any additional Windows updates and the 4406 events stopped again.

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