Q; We save files in OneDrive. One of our files is damaged and can’t be opened. How can we recovery it?
A: 1. try revert to the earlier version! Right click the file and choose version history.
2. In File -> Version History you can find all the different versions of the document. This is where you can find the exact time for each version as well.
Within File Options -> Save you will find these options too:
3. If above doesn’t work, try to restore it from the Office 365 backup.