Hello,

I want to add a windows 10 KMS key to a Server 2012 R2 host.  I will be migrating from a server 2008 r2 KMS host.  On the KMS Host Keys to products activated list it shows that a Windows 10 Volume license KMS key will also activate Windows 7 and 8.  On my existing KMS I have the Windows Server, Server Standard Edition (2012r2) KMS Volume licensing Key that also activates windows 7 and 8.  Can both of the 10 and Server 2012 r2 keys coexist on the same KMS host?

Hi Misha,

I suppose it is supported.

We need to install an update on Server 2012 R2 to activate Windows 10.

https://support.microsoft.com/en-us/kb/3058168

Besides, for central management, we could use VAMT,

Volume Activation Management Tool (VAMT) Overview:
https://technet.microsoft.com/en-us/library/hh824953.aspx?f=255&MSPPError=-2147217396

Best Regards,

Leo