User in a child domain cannot login into primary domain - advise please.

[Guest Doug D]

Hello. We have a primary domain and a child domain at my work location.

For security reasons we have a group of users in the child domain. They

can login fine to the child domain and they should be issolated from

our primary domain. For this example I will call the primary domain,

acme.com and the child domain, child.acme.com

 

We now have a need for some of these users to have the ability to login

to the primary domain.

How can I allow a few users from child.acme.com the rights and ability

to login to our primary domain, acme.com without moving their accounts

in AD from the child to the parent?

 

When I try to login from a client workstation that is joined to

acme.com I cannot see any of the child.acme.com users.

 

Thanks for any help.

 

Doug D