It goes on to add, among other things, that support for Office 2016 was meant to be for only five years and these are going to run out in less than two months and a half from now. In fact, most online help content will be retired.“ No further updates to support content will be provided.You’ll no longer receive phone or chat technical support.Open the Finder> Applications> Utilities> Keychain Access> Remove all keys related to Microsoft Office. Security updates are what help protect your Mac from harmful viruses, spyware, and other malicious software. Sign out from the Office apps and quit all the Office apps. You’ll no longer receive security updates.You’ll no longer receive Office 2016 for Mac software updates from Microsoft Update.But here’s what the end of support means for you: Rest assured that all your Office 2016 apps will continue to function-they won’t disappear from your Mac, nor will you lose any data. “ Support for Office 2016 for Mac will end on October 13, 2020. (Curiously, it is the same day as the EOL of Office 2010 for Windows.)

More about the EOL of Office 2016 for Mac here:

License removal tool for mac office