Sometimes Office365 OneDrive folders will end up being corrupted. That might happen when the folder has a large number of files or subfolders.

Here is how to fix it:

  1. Delete your sync pair
  2. Rename the folder in Office365 Onedrive (for example rename it to “old_name SAVE”)
  3. Create a new folder in Onedrive with the same name (i.e., old_name)
  4. Copy all files and folders from “old_name SAVE” to “old_name”
  5. Delete “old_name SAVE”