Install the following update: An update is available for Windows 7 and Windows Server 2008 R2 KMS hosts to support Windows 8 and Windows Server 2012 as described in KB2691586.
If you don’t install this hotfix registering a Windows Server 2012 KMS will throw an Error: 0xC004F050 The Software Licensing Service reported that the product key is invalid
We can start putting our brand new KMS key into action.
slmgr.vbs /ipk NOPEI-AMNOT-GIVIN-GITTO-YOU!
We run slmgr.vbs /dlv again and as you can see now we can activate all our Windows 2012 servers and Windows 8 computers