There is one important lesson when it comes to backups that I have learned a while ago: always verify that a backup is correct
. In this case it does not seem that much harm was done and I hope that the lesson was learned.
In a company I worked for, only incremental backups were made of the mailboxes on an exchange server. When the shit hit the fan, not all mailboxes could be recovered because an early incremental backup was corrupted. Nice way to clean out your inbox
The departemental head got fired for it.