Microsoft does not provide product keys for Office 2016 anymore — Microsoft no longer sells Office 2016 directly. If a user finds a supposed "brand new" Office 2016 key for sale, it is almost certainly either counterfeit, stolen, or harvested from compromised systems.
Searching for a "Product Key Generator" for Microsoft Office 2016 is generally unsafe and highly discouraged for a few key reasons: Security Risks: Product Key Generator For Microsoft Office 2016
For businesses, volume licensing through a Microsoft partner is far cheaper per seat than retail. You also get KMS or MAK keys to manage multiple activations legally. Microsoft does not provide product keys for Office
Thank you for installing Microsoft Office Home and Student 2016. Activation is required to authenticate this copy of Microsoft Office. This wizard will guide you through the Activation process. You also get KMS or MAK keys to