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
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

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
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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DFS Replication is Not Compatible with NTS Deduplication

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