Forum Discussion
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...
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.
Hello,
Did you encounter the issue with 2012 R2 specifically, or with both OSes ?
Did you encounter the issue with 2012 R2 specifically, or with both OSes ?
- It's occurring with both OSes. This morning a 2012 R2 system generated 2 new 4406 events. Yesterday, I "unoptimized" everything on a 2019 server and then re-enabled deduplication. That server generated a few 4406 events right after the deduplication was re-applied.