Windows Server 2012 KMS Service Activation

So we have Windows Server 2012 and Windows 8 RTM and want to activate them with our KMS server. For this to be successful we need to update our KMS Service, with is currently servicing out Windows Server 2008 R2 servers and Windows 7 clients. When we try to activate a Server 2012 server the following error will occur: To resolve this issue: Download and install the following update: KB2757817 (Update adds support for Windows 8 and Windows Server 2012 to Windows Server 2008, Windows 7, and Windows Server 2008 R2 KMS hosts). How to obtain this update The following files are available for download from the Microsoft Download Center:Collapse this tableExpand this table

Operating system	Update
All supported x86-based versions of Windows Vista and of Windows Server 2008	Collapse this imageExpand this image Download the update package now. (http://www.microsoft.com/downloads/details.aspx?FamilyId=cca1a7a5-10f5-4aea-b0c5-999f2dc9f07f)
All supported x64-based versions of Windows Vista and of Windows Server 2008	Collapse this imageExpand this image Download the update package now. (http://www.microsoft.com/downloads/details.aspx?FamilyId=85cdb6a5-9658-47b3-b344-0284954a7379)
All supported IA-64-based versions of Windows Vista and of Windows Server 2008	Collapse this imageExpand this image Download the update package now. (http://www.microsoft.com/downloads/details.aspx?FamilyId=799f0f06-cbca-483c-8130-9bb99d8dc87e)
All supported x86-based versions of Windows 7	Collapse this imageExpand this image Download the update package now. (http://www.microsoft.com/downloads/details.aspx?FamilyId=a1829040-975f-43ab-877d-5cf4a5382987)
All supported x64-based versions of Windows 7	Collapse this imageExpand this image Download the update package now. (http://www.microsoft.com/downloads/details.aspx?FamilyId=23fd50b9-baa5-466f-9dff-af06729f23a9)
All supported x64-based versions of Windows Server 2008 R2	Collapse this imageExpand this image Download the update package now. (http://www.microsoft.com/downloads/details.aspx?FamilyId=bd2cda64-6319-4beb-91e3-9439048bf19d)
All supported IA-64-based versions of Windows Server 2008 R2	Collapse this imageExpand this image Download the update package now.

  If you don't install this Update then registering a Windows Server 2012 KMS will throw an Error: 0xC004F050 The Software Licensing Service reported that the product key is invalid. So install the update (Windows6.1-KB2757817-x64.msu) and restart the server! Just restarting the KMS service ("net stop sppsvc" and "net start sppsvc") is NOT enough. Let's see what is already running: slmgr.vbs /dlv => The Windows 2008 R2 KMS key. Uninstall the current KMS key using slmgr.vbs /upk (We all know this has to be done from an elevated command prompt..) Now it is time to install the new KMS key. slmgr.vbs /ipk {YOUR_SERVER_2012_KMS_KEY} slmgr.vbs /ato to activate the KMS Service And now we can check our environment to see what we can activate: slmgr.vbs /dlv => the Windows Server 2012 KMS key.