What is Key Management Service and what is a KMS key?
Key Management Service (KMS) uses a KMS key to establish an activation service that is hosted locally in your environment. The KMS key is used only to activate a computer that you designate as the KMS host to enable KMS. After the service is established, your Windows Vista and Windows Server 2008 systems can activate by connecting to the KMS host. No keys are used to activate the KMS client systems. Systems activated via KMS must reactivate at least once every six months by connecting to the KMS host. A minimum number of physical KMS client machines is required and must be maintained for activation of KMS clients to occur. Learn more about KMSA KMS key can activate six KMS hosts with up to 10 activations per host. Each host can activate an unlimited number of computers that are running Windows Server 2008, Windows Vista Business, or Windows Vista Enterprise operating system, so you may need only a single KMS host. If you need more activations for your KMS key, you can call your Microso
