You can't sync files or folders in SharePoint Online in Office 365, or you receive error messages when you open the files in Office Online

PROBLEM
This article contains information that applies when you use the OneDrive for Business sync client (groove.exe).

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.
SOLUTION
To work around this issue, use a folder name other than "_private" in SharePoint Online or OneDrive for Business.
MORE INFORMATION
This issue occurs because a folder that's named "_private" isn't supported in SharePoint Online.

Still need help? Go to the Office 365 Community website.
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Article ID: 3078929 - Last Review: 03/09/2016 15:59:00 - Revision: 3.0

Microsoft SharePoint Online, OneDrive for Business

  • o365 o365e o365p o365a o365m o365022013 KB3078929
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