Enable Notify on Pages Changed by Other Users
In "OneNote Reminder" main window.
Check the menu item "Alert when Page Modified by Other Users" in "Alert" menu. "OneNote Reminder" will start monitor the OneNote pages changed status.
When somebody modified pages of shared notebooks with you, "OneNote Reminder" will pop up messages to notify you which pages have been changed.
Click on the message, it will jump to the OneNote page.
The pop up messages will stay a while and disappear. You can go to History window of "OneNote Reminder" to view the message again. Click on the list item, it will jump to the related OneNote page.