Given the situation, I suggest you follow the troubleshooting steps below and let us know the outcome:
a. Make sure the client has been updated to the latest version and tell us the product version via the steps in the
kb. Capture a screenshot showing the product version for us.
b. Clean credentials and caches by following.
1. Click Stop syncing a folder and delete all folders.
2. Exit all Office applications.
3. Go to Control Panel > User Accounts > Credential Manager > Windows Credentials.
4. Remove all credentials there(This will remove your stored passwords.).
5. Run regedit as an administrator to open Registry Editor.
6. From Registry Editor, browse to:HKEY_CURRENT_USER\Software\Microsoft\Office\15.0(16.0)\Common\Identity\Identities.
7. Check to see if there are any folders listed under Identities. If yes, delete them.
Note: 15.0 is OneDrive for Business 2013. 16.0 is OneDrive for Business 2016.
8. Reset IE via the stesp in
https://support.microsoft.com/en-us/kb/923737. 9. Download the Fix it tool from the kb and use it to clean the caches of the OneDrive for Business client automatically after backing up the files. Then, open the OneDrive for
Business client to re-sync the files.
NOTE: before running the Fix it tool, please read carefully and make sure you understand the sections ”Data that you lose when you run this tool” and “Back up your data and record any currently synced sites” in the article.
10. Restart the computer and go to Start->All Programs->right click OneDrive for Business 2013(2016)->Run as administrator.
Please let us know if it works so that we can provide further help.
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