These "generators" are almost always scams or malware.
When the activation prompt appears, select "I want to activate the software by telephone" and click Next. microsoft office 2016 confirmation id generator
This paper examines the technical architecture of Volume Licensing activation in Microsoft Office 2016, specifically the Key Management Service (KMS) and Telephone Activation protocols. It analyzes the ecosystem of "Confirmation ID Generators"—tools designed to bypass these protocols. The discussion focuses on the mathematical principles behind activation, the legal framework prohibiting such circumvention (specifically the DMCA), and the significant cybersecurity risks posed to end-users who utilize these unauthorized tools. These "generators" are almost always scams or malware
If you have a legitimate license but cannot activate it over the internet, you must use the Telephone Activation you must use the Telephone Activation