Key Management Service (KMS) is a legitimate activation method developed by Microsoft to help large organizations automate the activation of Windows and Office across their internal networks
In a corporate environment, it is impractical for IT administrators to manually enter a unique product key on every single computer to activate Windows or Office. To solve this, Microsoft created KMS. This allows organizations to host a local activation server within their network. Computers on the corporate network connect to this local server to activate their software. This activation is temporary (usually valid for 180 days), after which the computer automatically attempts to reconnect to the local server to renew the license. Kms Activator