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To put our Windows 8 KMS key onto our KMS server running Server 2008 R2, it appears that we first need to remove the existing Windows 7/Server 2008 key.

Is this the case? If so, do the new Windows 8/Server 2012 KMS Keys still allow older operating systems (Windows 7 and Server 2008) to be activated?

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First of all, it is necessary to install KB2757817 in order to activate a Server 2012 KMS key on Windows Server 2008 R2.

Second, you need to clarify whether you actually have a Server 2012 KMS key. You will not be able to install a Windows 8 KMS key on a server, period. However, server KMS keys typically can activate client operating systems.

For example:

  • Server 2008 R2 KMS keys will activate Server 2008 R2, Server 2008, Windows 7, and Windows Vista.

  • Server 2012 KMS keys will activate Server 2012, Server 2008 R2, Server 2008, Windows 8, Windows 7, and Windows Vista.

  • Windows 8 KMS keys cannot be installed on Windows Server operating systems, nor can they activate servers. They will activate Windows 8, Windows 7, and Windows Vista.

  • I'd installed the update, the 2012 keys seems to have gone on ok. Thanks – beakersoft Oct 30 '12 at 16:19

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