I have a single forest, my first domain is called corp.local, i have recently added a new domain as a root of a new tree called clients.local
They are all on the same LAN with no firewalls enabled, by IP i can ping all the DCs from new domain to old and old domain to new (i have 2 dc's in first domain and just 1 in my new domain for now)
On the DC in clients.local DNS is installed and contains the AD integrated zone for clients.local,
the Zone for corp.local is an AD integrated zone on the 2 DC's
I have noticed 2 issues.
1) When i create a conditional forwarder from clients.local to corp.local and specify the IP addresses of my DC's i get the error
"the server with this ip address is not authoritative for the required zone", in the Server FQDN colums is correctly shows the DC's FQDN
I also get the same message when i try the reverse, so when i create a conditional forwarder on corp.local DNS server for clients.local and specify the IP of the DC in clients.local
Any ideas why this is, i thought conditional forwarders was as simple as specify the domain name and give it the IP of a DNS server.