This shouldn't happen. If you create a Word document within a subfolder of OneDrive, and open it in Word, it should be saving to OneDrive with autosave enabled.

This shouldn't happen. If you create a Word document within a subfolder of OneDrive, and open it in Word, it should be saving to OneDrive with autosave enabled. Perhaps you are using an older version of Word and/or the OneDrive client?