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Visit Stack Exchange I have a Win2k8 R2 server and Win 7 clients. This is on the same subnet but a different IP range.If the clients happen to pick up their IP from the server then all is fine but if they get it from the router's DHCP then the DNS record on the server does not get updated even though dynamic updates is set to 'nonsecure and secure'.Image of the DNS tab Another issue that we found out is if the DNS zone (both) is set to Secure only.If the Machine is not generating a unique SID, then an Active Directory integrated DNS will have the option to be set as allowing secure updates only.I found that my DNS servers had scavenging set for 3 days and my dhcp scope was set to 1 day leases.

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Edit: According to the article linked by The Cleaner below, the GPO I mentioned in my comment will not do what you want (yeah MS and closed-source software).

This could easily be overkill, but since the above answers didn't cover things from a group policy angle here goes. sends option 81 and its fully qualified domain name to the DHCP server and requests the DHCP server to register a pointer resource record (PTR RR) on its behalf.

The dynamic update client registers an address resource record (A RR). the DHCP server can be configured to instruct the client to allow the server to register both records with the DNS.

- More specifics in my blog, with screenshots: This blog covers the following: DHCP Service Configuration, Dynamic DNS Updates, Scavenging, Static Entries, Timestamps, Dns Update Proxy Group, DHCP Credentials, prevent duplicate DNS records, DHCP has a "pen" icon, and more...

Published by Ace Fekay, MCT, MVP DS on Aug 20, 2009 at AM 3758 2 summary How Dynamic DNS behaves with multiple DHCP servers on the same Domain?

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