When you recover a physical machine from a backup, a new machine identifier is created. Therefore,
the machine is not able to back up to the subscription it used before recovery.
To continue backing up the machine to the same subscription, reassign (p. 21) the subscription to the
machine. If you do this, the next machine's backup can be incremental. If you assign a new
subscription to the machine, the software will have to do a new full backup.