KMS stands for “Key Management Services”. If a company wants to keep a tap on their Windows 10 computer and make sure these computers get back to the corporate network from time to time and do not need to connect to the internet, KMS is the way to go. Instead of going through Microsoft Activation Server, KMS keys go through corporate KMS servers. Every time a device is activated using KMS this is what happens: 1. Like MAK keys KMS keys are also holds a specific number of device activation. The difference between the both lies in how we configure and process KMS activation. 2. When choosing KMS activation, you install a KMS service on one of your Windows servers and that host will then act as an activation server within your organisation. Systems activated through the KMS must periodically re-validate themselves (180 days). 3. The advantage of this method is that you can’t permanently waste KMS keys through a constant cycle of OS re-installation. Eventually expired activation return to the KMS server and increase the available activation count.