If I created domain A and added 2 child domains B & C would a user from domain A be able to log into the child domain B or C by selecting the drop down box at login?
Domain A would be UK
Domain B would be Spain
Domain C would be USA
They want to look at placing all of the accounts onto Domain A then depending where they are in the world they want to be able to log into that location.
Subdomins are required so that if any changes are made to any GPO’s then it won’t effect the other domains.