When you sign in to OneNote for iPad, your notebooks on OneDrive sync with your device. If you don’t already have a notebook, one with your name is created for you.
If you have OneNote 2010, 2013, or OneNote 2016 notebooks on your PC or Mac and want to access them from your iPad, you’ll need to first put them on OneDrive or SharePoint.
If you have notebooks in more locations, you can sign in and sync those notebooks with your iPad.
To sign in to additional accounts, tap the Settings icon , and then select + Add a Service.