Lost OneDrive files

FYI - after installing Monterey, the onedrive folder and all files were moved to //mac/users/user name/library/cloudstorage. Drove me nuts too until I found where they were moved to. Don't understand why they did that but that is what happened. Made it much more complicated.

Make sure your macOS OneDrive app is updated to the latest version (forgot to specifically mention that in my other post although it was somewhat implied).

Is sharing enabled on any of your OneDrive files where maybe another user is able to delete or modify the items?

If the items weren't accidentally deleted by you, then you may need to contact Microsoft especially if you continue to see this happen. Sometimes Microsoft may be able to restore items, but time is critical in reporting the issue.

FYI, always make sure to have frequent and regular backups of your computer and any external media which contains important & unique data. Don't rely on cloud services for your only copies of your files. Always have a local backup and/or a local copy of all your important files.

Cloud services can change the rules at any time without any warning. It is Ok to use the cloud to store an extra copy so you the files can be accessed from anywhere, but don't have all the copies only in the cloud.

Are you using the OneDrive app or accessing OneDrive from a browser? Have you checked OneDrive using the browser? Might be useful information for others who wish to assist you. It is possible the OneDrive app is not fully compatible with the recently released Monterey.

Sorry I cannot be of any further assistance since I don't rely on cloud services except to be use them as a convenience for a small subset of my data that I want to access from any location.

I have the same problem, the trouble is I just realised this problem two weeks after the files are gone.

As a teacher, I use Keynote for the presentation. Somehow the .key files are visible but the metadata are all gone.

So were you able to retrieve your loss files on OneDrive or are they completely gone?