Windows 10 LTSB not activating against KMS Server

Hello,

I am trying to activate Windows 10 LTSB machines against a 2012 R2 KMS server.  I have installed the KMS role on the server along with my 2012 datacenter KMS key which should be sufficient for activating a Windows 10 client.

However, when my clients try to activate, they are getting the error message that the key was already used on another device, and it appears as though it is trying to activate with a MAK key.

It doesn't even look like it is trying to activate against the KMS server.  My office 2016 activations are working without an issue.

I'm not sure what needs to be done to make this think look at the KMS server for the activation or to be sure that it is looking at the kms server for activation.
Chris WhitakerAsked:
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Cliff GaliherCommented:
If you installed with clean media then there would be no MAK key.  I can only assume you drew that conclusion from something not fully disclosed yet?

At any rate, you can re-apply a GLVK and then it'll know to try to activate against KMS.  GLVK keys are listed here:

https://technet.microsoft.com/en-us/library/jj612867(v=ws.11).aspx

Pick the key that matches the media you used.
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Chris WhitakerAuthor Commented:
Yes, I believe at some point while trying to get KMS working, an invalid key was installed on the machine we were using to image.  I re-applied the key from the link you sent and that solved the issue.  Thank you for your help!
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