Volume Activation Management Tool (PN)~ An MMC snap-in that enables IT professionals to automate and centrally manage the Windows and Microsoft Office volume and retail activation process. VAMT can manage volume activation by using Multiple Activation Keys (MAKs) or the Windows Key Management Service (KMS). Volume Activation Services (PN)~ A server role in Windows Server that enables users to automate and simplify the issuance and management of Microsoft software volume licenses for a variety of scenarios and environments. With Volume Activation Services you can install and configure the Key Management Service (KMS) and enable Active Directory-based Activation.