hi,
please check the following rights on System logon account used for backups/restore:
1. user has a mailbox created on Exchange server.
2. user has Exchange admin rights on Exchange.
3. user is a member of Domain Admins.
4. user is not hidden from Global Access List.
5. The first 5 characters of the user are not similar to any other user in the domain.
If they fail, you may have to fulfill all these conditions and take a backup again.
If these conditions are satisfied, please create a temporariy B2D on the local drive.
Make sure you have enough space on that drive (equivalent to the information store).
Then, run a duplicate backup job from tape to B2D.
Try to restore from the "IMG folder" media created on the B2D. You should be able to see individual items.