Comment by anon9001

Here's a KMS server emulator, all open source: https://github.com/Wind4/vlmcsd

If you want to skip straight to the piracy, here's an open source package for you, complete with keys, hosted ironically on Microsoft servers, that uses vlmcsd: https://github.com/ekistece/vlmcsd-autokms

It's a pretty clever hack. It runs the KMS emulator locally and fakes the network connection with a TAP device from OpenVPN. Works perfectly.