I just want to know why my trust works but i cant see other forest in Active directory users and computer on the other forest. for example: forestA and ForestB has two way trust and conditional forwarders are properly set. configuring the the two way trust is ok. currently i want to add a computer account from forestA to a group in ForestB but when i click on locations i can't find forestA from the list. What is the problem with my setup? Is it a network issue? Firewall ports? DNS?