A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Though I have Office Personal or Home or whatever it's called, not one of the enterprise versions like ProPlus, I tried this. What it seemed to do was gray out the AutoSave switch in the title bar, but documents were still auto-saving. So I undid the Registry entries.
BTW, my version auto-saves/syncs as soon as I open documents and before I make any changes, wiping out the last modification date. Changing the sync setting in OneDrive seems to have worked only after I exited and restarted OneDrive.