Moving KMS follow-up question

I am facing a KMS server on Server 2012 but we need KMS to be moved to a Windows 2008 R2 server, temporarily for a few reasons.

I'm a little confused on what key I'm supposed to use exactly.

After I've removed KMS from Server 2012 and have deleted the DNS entry (or can I just update the existing DNS entry?), I'm confused on the following:

When command "slmgr.vbs /ipk [Your KMS Key]" is run on the 2008 Server, is the Your KMS key supposed to be the KMS key for Server 2008 R2? Or should I use a Windows Server 2012 R2 key to establish a higher key in hierarchy that will activate Server 2012/Windows 8 and lower clients?

And when I add Office 2010/2013 keys, how do I install those for KMS to use to activate them as well? Is it the same DNS record?
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Justin YeungSenior Systems EngineerCommented:
1. if you are changing your KMS server name, you will need to update your SRV record for activation, it is a SRV record!!!
2. in order to allow KMS 2008 R2 to activation 2012/win8 machine, you will need to install the patch on 2k8 server
3 for office activation, you can install office volume license pack

Machines are activating via DNS SRV record and find the A record (IP) that specified on the SRV record, unless you used /skms command to specific the target host name for activation.
you might able to use CNAME record pointing to for the resolution but I have not tested it and can't proof it.

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garryshapeAuthor Commented:
So do I use a 2008 KMS or a 2012 KMS key
Justin YeungSenior Systems EngineerCommented:
I have never done it before but I assume you will need to use the 2008 KMS key.
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Windows Server 2008

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