I found out what it was. Last night I scheduled another backup at 11:39 pm when there would be no one here at work. Came in this morning, there was a failure, this time, only one file was so called corrupt. Looked at the log, was the same user as yesterday. So I asked him if he leaves his Outlook running when he leave for work, he told me yes so that told me thats what was causing this. I'm going to run another backup tonight at the same time to see if it is a success, more than likely i will. Thanks