The mailbox content and attachment task failed with the following error:
Unable to logon to mailbox /O=EXORG/OU=EXCHANGE ADMINISTRATIVE GROUP (FYDIBOHF23SPDLT)/CN=RECIPIENTS/CN=MAILBOX_NAME. 0x8004011D: The Microsoft Exchange Server computer is not available. Either there are network problems or the Microsoft Exchange Server computer is down for maintenance. MAPI_E_FAILONEPROVIDER (Microsoft Exchange Server Information Store) Low level error: 0x0.
This is applicable just for mailbox content and attachment tasks that are running against an Exchange 2007 servers.