In order to Backup Exchange mailboxes successfully please ensure that following guidelines are met:-
1.) Anti-virus software acc
essing the Information Store at the same time as the backup, i.e. using the same Messaging API as Backup Exec does.(It is then recommended to stop Anti-virus software services when backing up the mailboxes).
2.) Multiple levels of embedded mail messages (a message attached to a message attached to a message etc.)(remove message)
3.) Automated system messages (undeliverable, over size limit etc.)(remove message).
4.) The message / attachment is really corrupt (can't open, view or execute)(remove message).
5.) Virus infected Information store (clean for virus).
6.) Very long subject lines (remove message).
7.) Very long attachment names (remove message).
8.) Very large attachments (might give out of resource like errors)(remove message).
Check the name of the mailbox (which gives error "is a corrupt file") in job log and download all the mails of that mailbox to personal folder file (.pst)
The above errors inform that there are few mails in the mailbox which are undelivered and are returned back to the mailbox. Kindly delete such mail messages and then carry out the backup job operation.
In addition to above steps please refer to following technote as well.
Title:- Backup of Exchange mailboxes fails with final error code: "a000feab HEX Final error description: Corrupt data encountered."
http://seer.support.veritas.com/docs/266219.htm
Also we suggest you to select only the user mailboxes under the Mailboxes while backing up in Exchange.
As an additional information please refer to the following technote :- When backing up Microsoft Exchange 5.5 / 2000 individual mailboxes, the message " WARNING: "?Top of Information Store?? " is a corrupt file. This file cannot verify." is returned in the backup log as an Exception in VERITAS Backup (tm) Exec 9.0 for Windows Servers.
http://seer.support.veritas.com/docs/255047.htm
We hope this helps. Let us know if the problem still exists and revert back with the error message.
"NOTE : If we do not receive your intimation within two business days,
this post would be 'assumed answered' and archived.",
