XADM:Move Server Logs Failure if MailBox Does Not have a Windows NT Account

SYMPTOMS

If the Exchange Server computer that you are moving has mailboxes which are not associated with a Windows NT account, then choosing to move the server to a new organization and/or new site using the Move Server Wizard will result in the following warning being displayed in the Windows NT Application Event log:

   Event ID: 9502
   Source: MSExchangeMvServer
   Type: Warning
   Category: General
   Description: Unable to completely cleanup mailbox
   '/o=Orgname/ou=Sitename/cn=Recipients/cn=Jane-92303-MB'
				

There is also a direct effect on performance. Each mailbox needs several seconds to be processed during this phase.