KMS activation

Hello all,

I have installed windows server 2016 standard on virtual machine and installed Volume Activation Services role on it (i want to replace old KMS Servers, Win Server 2008 and 2012 are running now) , from Microsoft Licensing portal i have copied kms key and activated server, the same key i have used to install KMS host Key. I have checked and i saw, that clients are contacting the server, the server received requests. Now i want my KMS server to be able to activate for example : Windows 7,8,8.1,10, Windows server 2012, 2012 R2, 2016, also office product, for this purpose when i run the command on KMS Server: slmgr /ipk window pops up: "Error 0xC004F050 The Software Licensing Service reported that the product key is invalid".

Can someone tell me what to do, am i doing something incorrect?

Thanks in advance