This similar to another question I asked here but phrased a bit more specifically.

We have 2 sites (A and B) and 2 domains ( and
Site A:
Site B: +

For our transition from to only, we need users to be able to use DCs on either domain.

Currently, we have a stub zone setup for on the DC. This allows users using this DNS server to ping DCs, however the computers think they are on Site A not site B. This causes problems with group policy.

So, stub zone is wrong.

How should I set it up?

Can I just set up a primary DNS server for on the DC then enable zone transfers?