When the mailbox is synchronized in the Remote Users Collection, it is being repeatedly deleted a (4259412)

When the mailbox is synchronized in the Remote Users Collection, it is being repeatedly deleted and recreated by the Mail Target Agent. The following messages will be repeatedly logged in the Mail Target Agent log file:

2009/03/30 06:06:07 PM CMBMSwitcher::IsSwitched2 TraceMsg 4908 Current mailbox /o=Target_Organization/ou=Site/cn=Recipients/cn=mailbox redirector state: Not switched.
2009/03/30 06:06:07 PM CMBMCopier::CopyMailbox TraceMsg 6130 Starting to copy mailbox /o=Source_Organization/ou=Site/cn=Recipients/cn=mailbox to CN=IS_Name,CN=SG_Name,CN=InformationStore,CN=Server_Name,CN=Servers,CN=AG_Name,CN=Administrative Groups,CN=Organization,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=DC_name,DC=DC_name.
2009/03/30 06:06:07 PM CMBMConn::GetMailboxInfoEx TraceMsg 4808 Retrieving mailbox information (Mailbox: /o=Source_Organization/ou=Site/cn=Recipients/cn=mailbox , Infostore: 161292D2EB682B4DACD60189F7519710, MailboxGUID: DBB2979E2F402E49AAAAE730FF7CDFF0).
2009/03/30 06:06:07 PM CExchAdmin::DeleteMailboxE2K TraceMsg 4700 Deleting mailbox /o=Target_Organization/ou=Site/cn=Recipients/cn=mailbox.
2009/03/30 06:06:07 PM CMBMCopier::CopyMailbox TraceMsg 6134 Mailbox /o=Target_Organization/ou=Site/cn=Recipients/cn=mailbox was deleted from the target server. The attempt to copy the mailbox will be repeated during the next session.