Unfortunately, and frankly inexplicably, Microsoft decided to make the AutoSave feature not only automatic, but also permanently on. Sometimes users want the older version of a document to remain intact while they use it as basis for a new file. But automatically saving a document, particularly with a new timestamp, is not always what users want. In general, automatically saving everything you do in a document as you do it is a fantastic idea-your work will never be lost to a power outage or some other catastrophic occurrence.
How to see who is trying to break into your Office 365 and what they're trying to hack.