KMS Server on Server 2012 R2 Standard Server

I installed a KMS server on Server 2012 R2.    I am trying to activate a Server 2008R2 Standard Server.   What is the process for activating the server with the KMS server.  Do I add a KMS license to the Server 2008R2 instance?   I have failing requests in the snippet?
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KMS is only useful for server licensing if you have 5 or more clients that need to register through it. Until you have 5 clients, you can use the KMS key to activate clients, but later on, when you do have more than 5 clients, you will want to undo this by re-keying the servers with the generic client key.

If you are building a network that will have the requisite 5 or more clients right away, you can use the generic key. The initial activations will temporarily fail, but KMS keeps track and once it sees 5 different clients, it will begin to activate them.

And it's 5 clients using the same edition/version of Windows Server. In your case, the KMS would need to have the keys loaded for both 2012 and 2008 and would need to see 5 2012 clients before it started activating them, and 5 2008 clients before it would start to activate them.
You will need to add the KMS key to your KMS server server, which in turn will activate the correct version of the OS.

Howerver you will need a minimum of 5 as stated above,

Check this article below, it will assist you with the process
stressedout2004Author Commented:
What's confusing to me is that I removed the key KMS key that I activated the server with a MAK key before the KMS was setup.  So I did the following:  

cscript c:\windows\system32\slmgr.vbs /cpky   <-- This clears out the current product key
cscript c:\windows\system32\slmgr.vbs /rearm <-- This rearms the client
After running the commands above:
Microsoft prompt came up and asked to activate in 3 days with a grace period of 30 days.      I clicked on the activate button with out entering a key and the server activated.    What did this server successfully activate against?      What more bothersome, is that the count does not increment.  Is that proper?
Jeremy WeisingerSenior Network Consultant / EngineerCommented:
... I activated the server with a MAK key ...
Since you already activated the server, Microsoft sees the hardware ID in it's database and activates the server. You will need to test with other hardware or a different version of Windows.

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