every week we perform a full backup of our SharePoint environment using the backup-spfarm command:
backup-spfarm -directory $directory -backupmethod full -Verbose
and every week, after the backup is performed, the User Profile Synchronization Service goes down. It also takes down the Forefront Identity Manager Service and the Forefront Identity Manager Synchronization Service.
Is there something that can be done to prevent the UPSS service from going down?