Hi,
Please refer to the Technotes given below ,in order to solve the problem :
Preliminary Troubleshooting List for Exchange and mailbox backups.
http://seer.support.veritas.com/docs/242606.htm
Backup Exec cannot back up Microsoft Exchange Mailboxes which are hidden from the Global Address List.
http://seer.support.veritas.com/docs/232086.htm
How to configure a Microsoft Exchange 5.5 and 2000 individual mailbox backup for Backup Exec 8.x, 9.x or 10.x software
http://seer.support.veritas.com/docs/249456.htm
For any further queries,please revert.
Thank you.
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