The second item is to configure a DNS area for master-slave replication. The info with this area will be periodically copied then from master (IPA server) to slave (AD host).
On IPA server, include an archive and a NS record for the advertising domain:
On AD DC, here two choices.
Initial one would be to configure a forwarder that is worldwide ahead DNS queries to your IPA domain:
The second item is to configure a DNS area for master-slave replication.Read More