What is the sync keyboard shortcut in OneNote?
Keyboard Shortcut for Desktop OneNote:
F9 sync changes in all shared notebooks. It cannot sync local notebooks.
Shift+F9 sync changes in the current shared notebook.
View Notebooks Sync Status:
Right click on a notebook, click "Notebook sync status" menu item on pop up context menu. In Shared Notebook Synchronization window, you can read the shared notebooks sync status.