Hello there,

we deployed a new KMS Server, activated the machine and imported all required KMS keys. All fine and running, clients can be activated successfully.

Within the last 4 weeks we had 2 times the same issue. We found out, that the DNS record has been changed automatically by Hyper-V hosts (different ones). Result was, clients activated themselves not to the original KMS server, but to the Hpyer-V hosts. Even more strange is the fact that we never installed any KMS features / keys on any Hyper-V server.

Any ideas?

Thanks in advance, Marcus

Hi

 Could you check SRV dns records for kms server,also check this article about;

https://technet.microsoft.com/en-us/library/ff793405.aspx

Hi

KMS host auto publish the DNS entry, but when you issue the slmgr, please do that;

cscript %windir%\system32\slmgr.vbs /cdns

and (to be really sure)

reg add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SoftwareProtectionPlatform"/vDisableDnsPublishing /tREG_DWORD /d1

After that, the dns entry will no longer try to register in the DNS.

Thanks

 Even more strange is the fact that we never installed any KMS features / keys on any Hyper-V server.

Are you sure?

check on your HyperV servers, which type of product key is installed on those servers, by using slmgr.vbs /dli (you can do that remotely in case your HyperV has no GUI etc)