If there are missing entries, you likely have your DHCP missing one of two settings: This is required if you have DHCP installed on a Domain Controller.
I have pc's that are on the network and devices on the network and it appears that my DHCP server is deleting their leases after they expire, rather than renewing them again since these devices are still powered on and connected to the network. The other side of this issue is after the DHCP lease has expired and gets deleted, it is not updating DNS A and PTR records.
Secure Dynamic Update Updating DNS Resource Recordshttps://technet.microsoft.com/en-us/library/ff631099(v=ws.10)How to configure DNS dynamic updates in Windows Server 2003. Using DNS servers with DHCP (Contains information on the Dns Update Proxy group and its usage) (WS.10)=============================================================== The credentials only need to be a plain-Jane, non-administrator, user account. Make sure ALL other non-DHCP servers are NOT in the Dns Update Proxy group.
Error 31, DNS Update Failed – Seen this one before? The place to look for logs is: C:\Windows\System32\dhcp, check yours out and see if you have any error 31’s.
What this means in practice is the following: This means the DHCP server computer account will own certain records in DNS, such as the PTR records and even some A records for older hosts.
(However, it's unlikely that you would have many NT 4.0 hosts in your environment.) This can cause the following two problems: For this reason, DHCP servers could be added to a group called Dns Update Proxy.