When attempting to synchronize mail to the target mailbox the following error is received:
4/11/2010 11:18:51 CSession::Logon TraceMsg 4800 Logging on to the mailbox '/o=ABCDE/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=qmmex2' (Server: 'SERVER1, user: 'Domain\QMMex').
4/11/2010 11:18:51 CSession::Logon Error -2147467259 Unspecified error File: 'aeMAPIProfile.cpp' Line: '88'
4/11/2010 11:18:51 CADQueue::NextItem TraceMsg 4514 No more items to process in this session.
4/11/2010 11:18:51 CBaseApp::StopSession TraceMsg 4704 Session has been stopped.
This issue was occurring due to Outlook 2010 being installed on the target server.
An uninstall of Outlook resolved the issue, Any version of Outlook should not be installed on Exchange within a QMM environment.