When I logged in to the Volume License Service Center recently to look up the KMS activation key for Windows 10 Enterprise, I was surprised to find that only Multiple Activation Keys (MAK) were listed. Searching online, I came across this blog post from someone who ended up calling Volume Licensing support to get his KMS key, but with no explaination as to why. After digging around a bit, I happened to come across an entry in the VLSC FAQ which explains the missing key.
If you can't read that, it says:
I am an Open Customer and do not see my KMS (Key Management Service) key displayed on VLSC. How can I get it?For whatever reason, Microsoft is no longer generating KMS keys automatically for customers using Open licensing. MAK keys are now considered "the preferred method for activation" and will be the only keys listed in VLSC for OPEN customers by default. OPEN customers can still receive a KMS key, but must call or email the VL support center to have a key generated.
KMS keys are no longer pre-assigned to Open agreements as use of MAK (Multiple Activation Key) keys is the preferred method for activation.
If you are an Open Customer and need a KMS key, please request one by either calling the PA Call Center or emailing KMSADD with your business need.
If you are an OPEN license customer in need of a KMS key, just send an email to email@example.com to request the a key and they should be able to generate one and add it to your account.