I saved a document to Onedrive. Came back a few minutes later, opened Word, found that the system had not saved my work to the server. Word gave me two options: to use my local or my server file. After searching for the most recent modify date, I chose the local file. Even though it was marked with a modify date in the last 20 minutes, my entire evening's work (started 2 hours prior) was gone. I searched for previous versions. No luck. I searched my autosave folder, nothing.
There has to be a way to recover autosaves that happen every 10 minutes, especially when you're tying all of Office to an unreliable Onedrive.
Until this is corrected, I recommend Dropbox. I've yet to have a problem with that solution.