DNS: 2 Domains, 2 Sites, 4 Servers!

[eean]

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

 

We have 2 sites (A and B) and 2 domains (New.com and Old.com).

Site A: New.com

Site B: New.com + Old.com

 

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

 

Currently, we have a stub zone setup for new.com on the old.com DC. This allows users using this DNS server to ping new.com 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 new.com on the old.com DC then enable zone transfers?

Thanks!