This of course in turn requires the DHCP server to have the appropriate permissions on the DNS server.
Any chance you're having an issue where the DHCP server in the old domain can't update records on DNS in the new domain ?
On the other half, this process does not seem to trigger.
Even though the events mentioned in the above article (e.g.
When a registration is triggered manually on the client (ipconfig /registerdns), everything works fine.