A Source Agent may return the following error: "MSAApp::ProcessMailbox Error -2147221233 Invalid (4292772)

The source agent may occasionally be seen to return an error similar to this:

"08/02/2012 12:19:22 MSAApp::ProcessMailbox Error -2147221233 Invalid mailbox '/o=ExchangeOrg/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=user1'(Infostore GUID: '22FD111B17E3487A9E6E2C11EE4354CC')"
 

If Calendar sync is used before mail sync then CSA will log the folowing:
CMBMConn::GetMailboxInfo TraceMsg 4808 Retrieving mailbox information (Mailbox: 'LEDN', Infostore: '', MailboxGUID: '').
2/24/2014 4:18:42 PM CMBMAdmin::SyncMailboxInfoEx Error -2147221233 Cannot retrieve the mailbox information.
2/24/2014 4:18:42 PM CMBMAdmin::SyncMailboxInfoEx Error 20 Resume without error