I can confirm the OP's report. I am facing the same issue so perhaps I can add some info.
On two of my Macs, I have a fresh install of macOS Catalina (10.15 with supplementary update). I downloaded OneDrive and the Office 365 suite from Mac App Store. Say, now, I have a Word file in my OneDrive folder. Whether AutoSave is On depends on how
I open the file -
- If I open the file from Finder, Word is unable to detect that the file is actually saved on OneDrive, so AutoSave is disabled.
- If I first launch Word, go to File > Open, choose "On My Mac", navigate to the OneDrive folder, pick my Word file, Word is still unable to detect that the file is actually saved on OneDrive, so AutoSave is disabled.
- If I first launch Word, go to File > Open, choose "Online Locations", pick my Word file, Word now knows that my file is on OneDrive, so AutoSave is on.
This appears to be a bug. I have two other Macs, both were upgraded from Mojave to Catalina (rather than a fresh install), on one the Office 365 and OneDrive were standalone, on the other the Office 365 and OneDrive were from Mac App Store. On these two
other Macs, Autosave is On regardless of how I open the file.
I have attempted to reinstall the products but to no avail.
For your information, my OneDrive version's 19.152.1013.0012 and my Word version's 16.30 (19101301). Both are the latest versions available on Mac App Store. On all Macs, OneDrive Finder Integration is enabled.
Many thanks.