I was teaching an Exchange 2003 support class for Symantec this week, so that their gold and platinum support guys had a good understanding of how Exchange really works :-), he talked about log files, and one of the guys asked what would happen if you created a new log file, for example, the last log file is E0000001.LOG and you create E0000002.log manually. We tried it to see, and the effect was that the Outlook clients would hang when trying to send mail, until you deleted the manually created log file, the other effect was when you performed an online backup the backup would fail, and then dismount all the Stores in the Storage Group that you were trying to backup, this then led them to ask what type of security risk this would be, if someone managed to create a worm that created a log file manually it would bring down all the Stores when you perform a backup. What are your thoughts? Mark