Backup of all Server on HyperV failed - Backing up System Reserved (SYSVOL) partition failed. Image backup failed

Hi, i try to backup my VMs on Windows Server 2022 HyperV and getting this error :

Level Time Message
Info 24.03.24 14:29 Starting unscheduled full image backup of volume “C:”…
Errors 24.03.24 14:30 Backing up System Reserved (SYSVOL) partition failed. Image backup failed
Info 24.03.24 14:30 Time taken for backing up client SRV-HYPERV-01[SRV-DC-01]: 31s
Errors 24.03.24 14:30 Backup failed

I have no idea why “ALL” VMs fail to backup.
Can anyone help me ?

I am using the HyperV Urbackp Client
( We have a valid subscription of Infscape Urbackup )

I’m sorry you are having issues.

To further analyse the problem a client debug log would be useful. The client log file is per default located at C:\Program Files\UrBackup\debug.log on Windows. Run C:\Program Files\UrBackup\enable_debug_logging.bat as admin to enable debug logging. Once debug logging is enabled reproduce the problem.

Attach the log files to your new post or send them to bugreports@urbackup.org because they may contain data which should not be public.