So I had a client that was unable to do a backup to his ReadyNAS and after some searching around I found that a registry key needs to be added to the system so that the backup can complete.
This has something to do with SMB/CIFS extenstions that are sent by Veeam that ReadyNAS does not fully support
I’ve added a REG_DWORD (32-bit) with the name UseCifsVirtualSynthetic and a data value of 0 to:
HKLM\SOFTWARE\Veeam\Veeam Backup and Replication\
on our Veeam server, restarted the Veeam backup service and backups now complete without any issues.
