How to add group to local administrators without removing the existing groups
I'm in the computer migration process using ADMT.
The migration will take place between the Forest A to Forest B.
I'm having a big problem to include a group domain B (which will be the new domain that will receive the accounts of computers) in the Local Administrator group of computers that will be migrated.
I've tried to make the process with the GPO Restricted Groups using the option This group is a member of and users and other existing groups in the Local Administrator group is removed when the GPO is applied.
I've tried using the GPO Local Users and Groups in Computers\Preferences Control Panel Settings and when I add a group domain B Administrators from the group created in domain A the Administrators group is simply removed from the group.
You will needd to Create a two-way, forest trust with forest-wide authentication.