I attempt to restore a mailbox item on Exchange 2013, but get Final error: 0xe00003bf - Cannot open one or more mail messages because of unknown Exchange Web Service errors. Review the job log for more information.
Article TECH190749 says the cause is that during the restore process Backup Exec tries to establish Exchange Web Services (EWS) connection on the mailbox server instead of the Client Access Server (CAS) which results in the failure. This may be true, however, our Exchange 2013 server is not only the mailbox server but is also CAS. The only workaround is restoring to PST (Disclaimer: the server that you restore the PST to needs Outlook installed.) Not a bad workaround if you only have a couple of items here and there to restore, but what if I need to do a brick-level restore of the whole mailbox? Can it even do a brick-level restore?
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