====== Did you install Windows with a stock Microsoft ISO but need to activate against a corporate KMS server? ======

If so, you just need to install a standard key from [[https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-R2-and-2012/jj612867(v=ws.11)|here]].
 
To do that, from an elevated command prompt: 

  slmgr /ipk <licensekey>

Then set your KMS server if needed with:

  slmgr /skms <your-kms-server>
  
Then to actually activate:

  slmgr /ato