We have a 2003 domain name xyz.local. Inside of DNS we have an AD integrated zone for xyzxx.com. We want to move to a new domain on server 2008 R2 called xyzxx.com. Will the two domains be able to run concurrently while we build it out and populate it? The DNS zone is the only area that the two would share. Clients on the existing domain will continue to use DNS from the 2003 AD servers. Clients moving to the new domain would be using DNS from the new AD servers. Everything I have looked at says this should work but I would love to get some expert second opinions... I can add details as needed. Thanks!!