Want 2012 AD Activation, will still need KMS for 2008/2008R2 servers already activated?

We want to move to 2012 AD Activation for our network as we're slowly migrating to 2012 from mostly 2008 R2, but if we do, will the 2008/2008 R2 servers already in use/activated still need the KMS we currently have?  I'd prefer not to have 2 activation servers, and i thought the KMS activated servers still need to check in every 30 days to stay activated.  Can i remove the KMS server used by my 2008/2008 R2 servers and get away with it - and just worry about the AD Activation server for my new 2012 servers?  or do i need to get the KMS server up and running with 2012 support?  prefer to ditch KMS and go AD activation without worrying about the 2008 boxes if its possible.  thanks.
Jody DavisSystems EngineerAsked:
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Peter HutchisonSenior Network Systems SpecialistCommented:
No, you will still need KMS server for 2008/2008 R2 as it will check it every 60 days or so. If not found, then the servers will become de-activated and display warnings.
You can install more than one KMS key on the same KMS server, so you do not need to have more than one KMS server. Apply the KMS key and activate it and then apply the next one, activate that and so on.
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Windows Server 2012

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