Updating Office from 2011 to 2016 is causing Office 2016 to ask for Activation.
We are using same Office 2016 for other Macs and it has never asked for Activation before.
Microsoft made massive changes in Office 2016 for Windows but has hidden most of the changes beneath a reassuringly familiar-looking surface.
With the new version, the world's most-powerful and widely used office application suite leaves its online and desktop-based competition even further in the dust, especially in its convenient and deeply integrated collaboration features.
If that connection is not made after 30 days, the license will expire, but will reactivate once you are connected again - as long as you maintain an active student status.