Hello,
1. Ensure that the job is being created while logged in as the Backup Exec service account.
2. Verify that the Backup Exec service account mailbox is not hidden.
3. Verify that the Backup Exec service account has Domain Admin and Local Administrative rights.
4. Verify that the Backup Exec service account has Service Account Admin rights at the Site level in Exchange.
5. Verify that mail can be sent to and from the Backup Exec service account mailbox.
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this post would be 'assumed answered' and archived."