Microsoft Office 365 Kms

For organizations deploying Office volume-licensed editions, client computers automatically have Generic Volume License Keys (GVLKs) preinstalled. However, if you are converting a computer from MAK activation or a retail license to KMS, you may need to install the GVLK manually.

via Server Manager.

Activated via a local server key for organizations that don't want every machine to reach out to Microsoft's servers directly for activation. Microsoft Learn Setting Up KMS for Volume Office microsoft office 365 kms

If you are using a Volume License version of Office (like Office LTSC 2021 or 2024), KMS is a powerful tool. It allows you to host your own "activation server" on your local network. Overview of volume activation of Office - Microsoft Learn Activated via a local server key for organizations

There is a fundamental technical mismatch between KMS and Office 365. Subscription vs. Volume Licensing Overview of volume activation of Office - Microsoft