I'm using Server 2003 SP1 and Exchange 2003 (Version 6.5 SP2). My initial problem is that Backup Exec (11d with properly installed Exchange agent) wasn't deleting the Exchange Transaction logs in the Exchsrv\MDBDATA folder. After doing some research, I've eliminated Backup Exec as the problem since NTBackup doesn't seem to purge the logs either.
When running NTBackup and selecting the Information Store (not the individual mailboxes) The backup runs completely without errors, Event ID 224 (Information Store (2384) First Storage Group: Deleting log files D:\Program Files\Exchsrvr\mdbdata\E000E920.log to D:\Program Files\Exchsrvr\mdbdata\E000EC26.log.) is noted in the event log, but the logs referenced are still in the D:\Program Files\Exchsrvr\mdbdata folder!
Checking in Exchange System Manager, under the Mailbox Store properties - the "TIme of last full backup" is listed as the same time the NTBackup completed.
Exchange knows the backup completed, NTBackup says the backup competed, and the Event log says the backup completed, but the logs are still there. How do I get the logs to automatically flush - please help!