Hello,
Causes of these errors have been traced to (but not necessarily limited to):
* Anti-virus software accessing 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).
* Multiple levels of embedded mail messages (a message attached to a message attached to a message and so on)(remove message)
* Automated system messages (undeliverable, over size limit etc.)(remove message).
* The message / attachment is really corrupt (can't open, view or execute)(remove message).
* Virus infected Information store (clean for virus).
* Very long subject lines (remove message).
* Very long attachment names (remove message).
* Very large attachments (might give out of resource like errors)(remove
Refer also to:
Title : Backup of Exchange mailboxes fails with final error code: "a000feab HEX Final error description: Corrupt data encountered."
http://support.veritas.com/docs/266219
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