: They use methods like Key Management Service (KMS) simulation to trick the software into appearing legitimate.
Most so-called activators for Office 2016 RTM are KMS emulators . They install a fake KMS server on your local machine (or redirect Office to a malicious remote server). The activator modifies system files (e.g., sppsvc.exe , ospp.vbs , or the license token store) to trick Office into believing it has contacted a legitimate KMS host. MICROSOFT Office PRO Plus 2016 V16.0.4266.1003 RTM Activator
The term "Activator" in your query refers to third-party tools designed to bypass Microsoft's licensing system . : They use methods like Key Management Service
End of support for Office 2016 and Office 2019 - Microsoft Support MICROSOFT Office PRO Plus 2016 V16.0.4266.1003 RTM Activator