Tried logging in as UnityInstall/UnityAdmin, and UnitySVC which have access to the Domain and still getting this error (also tried logging in as local Administrator.:
1/29/2009 9:45:20 AM: Attaching to DOH to check for rights to export messages from Unity
1/29/2009 9:45:20 AM: (error) attaching to DOH message store -2147221492 (Method '~' of object '~' failed) in procedure InitMessageExport of Module modMessages
1/29/2009 9:45:20 AM: (error) failed to log into DOH for message extraction