AD user not found error found in the MAGE log (4258278)

AD user not found error found in the MAGE log

The following error appears in the Mage agent log and the mailbox isn't processing
"AD User Not Found"

More detailed error
"2014-09-03              09:13:25.4790         Px115C    Tx9           A9            C1            M1           Trace        LdapHelper::FindOne. LDAP query: searchBase - 'GC://lab8.spb.qsft', filter - '(&(objectClass=person)(legacyExchangeDN=/o=Lab8/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=bb1))', username - 'lab8\qmmex'.

2014-09-03              09:13:25.5131         Px115C    Tx9           A9            C1            M1           Error        AD user not found

2014-09-03              09:13:26.1321         Px115C    TxE           A9            C1            M1           Error Quest.MigrationManager.Exchange.Basis.LdapHelperException: AD user not found

   at Quest.MigrationManager.Exchange.Basis.LdapHelper.GetMailboxHomeMDB(String ledn)

   at Quest.MigrationManager.Exchange.Agent.Jobs.Realm.get_MailboxHomeMdb()

   at Quest.MigrationManager.Exchange.Agent.Jobs.Realm.get_MdbInfo()

   at Quest.MigrationManager.Exchange.Agent.Jobs.Realm.get_ServerInfo()

   at Quest.MigrationManager.Exchange.Agent.Jobs.DisBaseJob.<Initialize>b__2()

   at Quest.MigrationManager.Exchange.Agent.Jobs.Realm.PreferMapi()

   at Quest.MigrationManager.Exchange.Agent.Jobs.Realm.get_Connector()

   at Quest.MigrationManager.Exchange.Agent.Jobs.DisBaseJob.PerformSync()

   at Quest.MigrationManager.Exchange.Agent.Jobs.DisBaseJob.RunJob()"

The corresponding AD user has been migrated to the target and then deleted on source (either AD user with the mailbox or mailbox only)

Migrate the AD user object once again.