Backup Exec isn’t flushing Exchange Transaction Logs

I recently came across a client’s backup that was completing successfully daily but not flushing the transaction logs for Exchange as it should.  In the job properties of Backup Exec, the Exchange section declares that it will perform a full backup and flush the comitted logs but it simply never happens.

After some research, Veritas article 280659 had the answer…and it was a simple one.  In the job properties, review the options under Advanced Open File and make sure the option “Process Logical Volumes for backup one at a time” is not checked.   As its explained in the article, if this is unchecked, Backup Exec will use a different open file option (VSS) for the Exchange logs to allow it to flush them afterwards.