DNS Dynamic updates Registration Credentials

Since Windows 2000 Server's DHCP server, Dynamic updates have worked out of the box easily.  Now with Windows 2008 R2, MAC filtering is capable with White and Black lists.  In addition, a bit of security has been added to enable this feature to function properly.  I suspect, it that it also creates a better auditing trail of this feature.  Who knows, but this is how you enable DDNS Registration Credentials.

DNS Dynamic updates registration credentials is the problem to an out of the box DDNS updates. Without it, the registering DHCP server owns the DNS record so the DHCP servers do not have permision to change it. Creating a new user account and making it a member of "DnsUpdateProxy" group makes this work. The user account can be named anything you want for example, "ddnsupdater".  Next set the DNS Dynamic updates registration credentials on the new Win 2008 R2 DHCP servers to that user. After that deleting all the DNS records from the old DHCP server, deactivate the old server and activate the new server.

To get to this setting, navigate to the DHCP snapin, right click on either IPv4 or IPv6 level you are setting up and click properties.  Click on the "Advanced" tab and click on "Credentials"

Next, Enter the DDNSUser Credentials to populate the fields Username, Domain and Password and Password again to ensure your fat fingers are synced up.  This will give the DDNS user based permissions for DHCP to allow for updates in DNS.  Click "OK" and that's it.

To test, release and renew the IP using IPCONFIG /release and IPCONFIG /renew, after which the entry should be uddated in your DHCP server and added to DNS.  The DNS entry will be updated for the scope. There, It's that easy.  If it doesn't work, check your logs C:\Windows\System32\DHCP

Best of Luck,