You will have a KMS host key if you are a Microsoft Volume License customer, and you will have a Windows 8 or a Windows Server 2012 KMS key if you subscribe to Software Assurance for the products. The final step is to update the KMS key, which is something not terribly well explained on the web either. Trying to apply this update to the RTM release of Windows Server 2008 R2 produces an Windows Update error that this update is not applicable to this system.Īfter applying the SP1 update to the KMS host, I was able to install the update, and after a reboot, we were nearly ready to start activating. Something you should note which I ran into which is not explicitly defined in the article is that this update only applies to Windows Server 2008 R2 with Service Pack 1. You can download the update from and register to receive the hotfix. Luckily, Microsoft have released an update for the Windows Server 2008 R2 KMS host services to support the application of new KMS keys and to accept the KMS activation requests from these operating systems. If you try to activate one of these new Windows editions using a Windows Server 2008 R2 KMS host, then you will likely encounter the following error:Įrror: 0xC004F050 The Software Licensing Service reported that the product key is invalid. With the recent RTM releases of Windows Server 2012 and Windows 8, we wanted to be able to activate our hosts and guests using KMS. In our environment, we have a Windows Server 2008 R2 virtual guest serving as our KMS host.
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