Note To determine which OneDrive sync client you're using, see the following Microsoft website:
When you start a repair of the Microsoft OneDrive for Business sync app, you receive the following error message:
We can't repair your synced libraries because a file is open. Please close all files in your synced library folders and try again.
For more information about how to repair OneDrive for Business sync connections, go to the following Microsoft website:
Article ID: 2965983 - Last Review: 29 Dec 2016 - Revision: 1