To remove, drag these to the Trash:
The Microsoft OneNote app from the Applications folder.
OneNote icon from the Dock.
All files and folders that begin with “com.microsoft.onenote” from the Library\Containers folder.
Restart your computer.
Note: The Library folder isn’t visible in Finder. To go to it, open the Go menu and hold down the OPTION key.
Warning: This step will remove all user data, include your notebook content. Please be sure to sync any changes you want to keep before proceeding.