Failed to copy or backup GPOs with cross forest trust

Hi,



I have 2 Domains, each one with is own Forest, Domain A and Domain B. Domain A has a outgoing forest trust to Domain B.



I created one in Domain A to configure restricted groups to become Local Admins in all Servers in Domain A. All is working fine, but when i try to copy or backup GPO, this erros is shown:

GPO: Add SysTeams Groups into Local Admin...Failed

Logon failure: unknown user name or bad password.


The event recorded is 2004 source group policy management:

Backup of GPO failed. Error [Logon failure: unknown user name or bad password.].


If i clean references to Domain B in my GPO, backups is successfull.   Any ideas?


Kind regards,

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Luís Carmo