Migracion de usuarios desde un dominio NT a un dominio 2003

Al migrar una cuenta de usuario me aparecio el siguiente mensaje de error.

2006-01-10 10:59:36
2006-01-10 10:59:36 Active Directory Migration Tool, Starting...
2006-01-10 10:59:36 Starting Account Replicator.
2006-01-10 10:59:36 Account Migration CHIMOSYS DOMINIOPROPA CopyUsers:Yes
CopyGlobalGroups:No CopyLocalGroups:No CopyComputers:No StrongPwd:All
2006-01-10 10:59:37 ERR2:7600 Unable to query global catalog in target
forest to verify whether user principal name (UPN) 'j_diaz@cmpc.cl' is
unique. UPN attribute will not be set. An operations error occurred.
2006-01-10 10:59:38 CN=j_diaz - Created
2006-01-10 10:59:40 SID for CHIMOSYS\j_diaz added to the SID History of
DOMINIOPROPA\j_diaz
2006-01-10 10:59:43 j_diaz - Password Copied.
2006-01-10 10:59:44 j_diaz was set to expire before the expiration date
specified in the wizard. Account will still expire at the earlier date.
2006-01-10 10:59:44 Updated user rights for CN=j_diaz
2006-01-10 10:59:44 Operation completed.

Este es log completo.

Anteriormente habia migrado cuentas sin problemas.

Agradecido.

Marcelo R.