I had a similar experience a couple of days ago: Shared folders are finally working again after 8+ months! I suspect that restarting the PC would have avoided the need to remove and re-add the links online, but whatever; it looks like things are finally getting better (though for many people, they'll get worse, first). As others have said, if you can wait, the best solution is to do nothing. If waiting not possible, there are several workarounds discussed within this chat:
- Open documents on the web - works for MS Office documents and allows full simultaneous access by multiple people
- Open documents through the web page, but select "Open in App", which will launch the appropriate desktop MS Office program. Again, works only for MS Office but allows full simultaneous access.
- Get a URL to the shared folder and mount it as a drive on your computer. (I didn't do this, so you'll have to find the detailed instructions elsewhere in this chat). Disadvantages: Doesn't allow simultaneous sharing of Office documents, doesn't work when offline, shared folders don't show up as subfolders in your OneDrive directory, and can be slow.
- Use a third-party program like Mountain Duck to get this functionality. Disadvantages: Costs money and doesn't allow simultaneous editing of Office documents. People who've done this report good results, but some reported a lag with very large folders.
- Abandon OneDrive for some other cloud storage service.
Given that MS itself has acknowledged that one account migrating while another has not is the trigger for the problem, it's unconscionable that they don't migrate family accounts together, since I'm sure that's where a lot of sharing occurs. Even better would be to follow the network of shares, migrating closely tied accounts as close to simultaneously as possible.