What should I do if my OneNote notebook is not updating or syncing with changes made by others?

1. Verify OneNote is running on the latest version and has all of the necessary updates.
2. Confirm the OneNote notebooks are connected to the same account.
3. Check the OneNote notebook is syncing over a valid internet connection.
4. Ensure the correct permissions are assigned, including allowing other members to edit the notebook.
5. Verify the notebook isn’t too large or has too many sections.
6. If applicable, verify the OneNote content is accessible from the SharePoint site.