This video shows you how to share notes in OneNote so that you can collaborate. Here are the steps outlined in the video 1) Select Share, 2) Type an email address, 3) Select Share, 4) Show or hide authors' initials

For more tips like this, check out the working remotely playlist at www.youtube.com/FoetronAcademy . Also, if you need any further assistance then you can raise a support ticket and get it addressed.