HEU KMS Activator is a tool designed to activate Windows operating systems and Microsoft Office products. It uses the Key Management Service (KMS) activation method, which is a legitimate way to activate software in a corporate environment.
Go to the KMS tab, select the Install KMS Activation Service checkmark, and click the Office activation icon. Step 5: Verification and Cleanup HEU KMS Activator 42.3.1 Activator Windows