1. Open any Office 365 program that can open a file and click File
2. Select Options from the left navigation
3. In the option window, select Save from the left navigation
4. Uncheck Autosave OneDrive and Sharepoint online files by default
5. Going forward, your documents will defaut to Autosave off. You will need to turn this setting off in every Office 365 program you don’t want Autosave turned on.
6. You can turn Autosave on and off manually for each document you are working on by toggling the setting in the upper left-hand corner of the program.