Note To determine which OneDrive sync client you're using, see the following Microsoft website:
After you upload or create a folder that's named "_private" in Microsoft SharePoint Online or in OneDrive for Business, you experience one or more of the following issues:
- When you synchronize the _private folder by using the OneDrive for Business sync app, you receive the following error message for any files that are in the folder:This file name contains invalid characters.
- When you synchronize the _private folder by using the OneDrive for Business sync app, the folder itself is synchronized, but no files in the folder are synchronized.
- You try to open an item that exists in the _private folder in Microsoft Office Online, you receive the following error message: Sorry, this document can’t be opened for editing.
Article ID: 3078929 - Last Review: 21 Dec 2016 - Revision: 1