It doesn’t exist in OneNote for Windows 10 or OneNote for Mac.) (Note that this functionality currently only exists in OneNote 2016. Better still, the new task is synced between both applications, so if you check it as complete in Outlook, it will show that way in OneNote, and vice versa. If you use both Outlook tasks and OneNote 2016, you should be aware of a clever way in which you can select any text inside OneNote and have that text automatically appear as a new task inside Outlook.
