I am a software developer so I don't have very much experience with Active Directory and setting up domain controllers, etc... so I am currently just trying to set up the simplest network possible to do one thing. All I want to be able to do is have 2 domains, A and B (in the same forest). Then I want to be able to get users replicated from domain B into the global catalog. That is all I need to achieve for now so I can do my testing.
I have a simple network set up: domain A and domain B. Domain A was the first domain created in the forest, so by default he stores the global catalog. I then added a second domain to the forest domain B. I created a user "testuser" in domain B. I then created a universal group "testgroup" in domain A and added "testuser" from domain B to "testgroup". I now assume that "testuser" should get replicated to the global catalog since he is a member of a universal group. The user does not get replicated. I have gone into "Sites and Services" and performed a "Replicate Now" from domain B's server. It states that the replication completed successfully, but I go and look in the global catalog and "testuser" is not there. By the way, I am examining the contents of the global catalog using the ADSI Edit tool.
Also, I have checked the replication topology using "Sites and Services", and it always checks out ok. It seems like this should be something easy and pretty basic to do, I am probably just missing something simple.