we have a Problem to insert the Windows 10 KMS keys on our Windows 2012 R2 KMS host Server. We intalled the hotfix KB3058168 and rebootet the System, but if we want enter the Windows 10 KMS key, a error message appears
"The specified product key is invalid, or is unsupported by this Version of VAMT. An update to Support additional products may be available online"
You cannot insert/install a Windows10 KMS Product Key, to a Windows Server OS.
(Nor can you insert/install Windows8.1 / Windows8.0 / Windows7 / WindowsVista, Product Key to any Windows Server OS)
A Windows "client" KMS Product Key (Vista/7/8/8.1/10) can only be inserted/installed to a Windows "client" OS.
To establish a KMS host upon a Windows Server OS, you can only use a Windows Server KMS Host Product Key.
At this time, no suitable Windows Server 10 (Windows Server 2016?) KMS Host Product Keys are available from MSFT.
If you wish to establish a KMS Host for Windows 10, (before the release of Windows Server 2016), you must use a Windows 10 "client" OS for the KMS Host Product Key, as a KMS Host.
:(
[EDIT: this is my assumption so far, based on all the previous times MSFT have released a new OS. MSFT might do something diffe