In OneNote, click File > Info > View Sync Status. You can verify this by doing the following: There may be times when your shared notebook is syncing normally except for one of its sections. Switch back to the notebook in OneNote for the web in your browser, and then click Open in OneNote on the ribbon. Next to the name of the affected notebook, click Settings, and then click Close.
Closing and re-opening the notebook there usually clears and successfully resets the connection. If you’re able to successfully open the notebook in OneNote for the web and the changes appear, the problem may be caused by the desktop version of OneNote. Press Enter to load the notebook in OneNote for the web.
In your Web browser, click inside the Address box, and then press Ctrl + V to paste the copied URL. Right-click the URL shown below the name of the affected notebook, and click Copy. If the notebook that won’t sync is stored on OneDrive or on newer versions of SharePoint, try opening the notebook in OneNote for the web (at This can help determine if the problem is caused by the server or by OneNote.