There is a known issue with SentinelOne Agent installed on a domain controller, which causes backups in Veeam for those machines to fail. The following error is displayed:

Processing SERVER Error: VSSControl: -805306334 Backup job failed. Cannot create a shadow copy of the volumes containing writer's data. Cannot prepare the [NTDS] data to a subsequent restore operation. Cannot process NTDS data. Updating BCD failed. Cannot execute [SetIntegerElement] method of [\\SERVER\root\wmi:BcdObject.Id="{cd12ab87-1a23-12f3-ba7c-dc9876b01357}",StoreFilePath=""]. COM error: Code: 0xd0000022

This is caused by the boot protection feature of SentinelOne. One possible   ...