Dhcp not updating lease
IP Settings on the clients correctly show both DNS servers.
On a semi related note: I know this has been a touchy subject some places I have looked. For each DC, what should their local DNS settings be?
DHCP requires the use of DNS dynamic update to keep name-to-address mapping information synchronized.
Using DHCP and DNS together on a network might cause problems when using older, static DNS servers, which cannot interact dynamically when DHCP client configurations change.
For some reason DHCP leases are not registered in either DNS server.
You might be able to do this by tweaking some group policy settings, or by running a script to bulk "ipconfig /registerdns" on a bunch of clients.
I have checked the event viewer logs for the DHCP and DNS server but nothing is present?
DNS servers provide domain name resolution for network resources.
If you're waiting on DNS scavenging, there's no fast way to do it.
Just let it ride until you're seeing id 2501 events in the DNS Server event logs.
When DHCP changes IP address information, corresponding DNS updates synchronize name-to-address associations for the computer.