Hello everyone, I have two domains in same forest, parent and child. My environment is Server 2003, Exchange 2007. There is a DC/DNS in both parent and child domains. When users log on to the child domain, they can see users from the parent domain in the GAB, but, oddly, cannot see users from their own child domain. Users from the parent domain can see users from both. When creating an email from child domain, only if advanced search is used, will the sender be able to find the users email address from the child domain.
In parent domain there are 1-DC/DNS, 2-CAS/HT Mail servers, 1-MB standalone mail server, and a 2 node exchange cluster. In the child domain, there are 1 CAS/HT/MB mail server, and of course, 1- DC/DNS.
Users from parent domain are able to see users from both parent and child domains.
Users from child domain CANNOT see users from their own child domain in the GAB, however, they are able to see users from the parent domain
Legend: CAS- Client Access server
HT- Hub Transport