A family of Microsoft word processing software products for creating web, email, and print documents.
I just upgraded to the new Monthly Channel build:
Version 1708 (Build 8431.2070 Click-to-Run)
In this build Autosave has been greyed out and set to off, so the issue no longer occurs. So while I don't get the pop up anymore, the autosave functionality has been removed from the current build. So there is some progress!