Background
Currently we have 3 DNS servers in use:
1) Windows Server 2008 DNS (installed 2012)
2) Windows Server 2012 DNS (installed 2013)
The two windows server DNS's are also used as Domain Controllers and DNS and are replicating entries correctly.
Goal
To use only Windows Server 2012 as DNS. (Add another Windows Server 2012 DNS and take the Windows Server 2008 DNS and the Linux DNS down.)
Problem
In my testing I've manually configured the DNS settings on test laptops to only use the IP of the Windows Server 2012 DNS. When I do this the GPO's won't run / update when logging in. Plugging in the IP of the 2008 server works perfectly.
I see entries (DNS, OU's, etc.) correctly replicated back and forth between the two servers however clearly something is missing or else this would work correctly.
Any help is appreciated.