Tuesday, November 8, 2011

Disabling automatic KMS to DNS publishing

If for some reasons you want to stop your Windows 2008 R2 KMS server from publishing everyday its Resource Record (RR) to the DNS, you have to use the built-in Software Licensing Management Tool (slmgr.vbs).

To do so, open  an elevated command prompt on the KMS server and run:

slmgr /cdns

A pop-up will appear telling to you to reboot the KMS Service:

From the same elevated command prompt, run the following command to restart the KMS Service:

Net Stop sppsvc && Net Start sppsvc

If you are running your KMS service on a older Windows version (not R2), run the following command instead (the service executable has been renamed in Windows 2008 R2... don't know why...):

Net stop slsvc && Net start slsvc

Now there are two ways to check that your KMS server has stopped trying to register its Resource Record in the DNS.

The first one is to open the Registry and see that the DisableDnsPublishing DWORD key has been added under :

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SoftwareProtectionPlatform

The value of this key has also been set to 1.

The second way to check that KMS publishing to DNS is off is with the command:

slmgr.vbs dlv

I hope this solution helped you. If you have any question or any comment do not hesitate to post.

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