
Hi,
Welcome to the Microsoft Community Forum!
As per your description, I understand that you've already done quite a bit to try and fix the AutoSave issue with Office files in OneDrive or SharePoint. Here are a few things to double check and try out.
- First, make sure the file is actually saved in OneDrive or SharePoint AutoSave won’t work if the file is stored locally. Also, check for any pending Office updates. Open any Office app, go to File > Account > Update Options, and hit Update Now to ensure you're on the latest version.
- Since OneDrive sync issues can interfere with AutoSave, open OneDrive and see if there are any sync errors. If there are, try pausing and resuming sync or resetting OneDrive altogether. Sometimes third-party add-ins can cause problems too, so go to File > Options > Add-ins, disable any non-Microsoft add-ins, and restart Office.
- It’s also worth checking the AutoSave settings inside Office. Open a document, go to File > Options > Save, and make sure AutoSave OneDrive and SharePoint Online files by default is turned on. If nothing seems to work, performing an Online Repair of Office might help go to Control Panel > Programs > Microsoft Office > Change, and select Online Repair instead of Quick Repair.
- Finally, if AutoSave still won’t cooperate, try adjusting the background save settings. Go to File > Options > Advanced, scroll down to the Save section, and uncheck Allow background saves.
For more details, you can check out Microsoft's official support page on How do I turn on AutoSave? - Microsoft Support
We wish you a good day!
Sincerely
carole | Microsoft Community Moderator