OneNote is a tool used to create notes for personal or business use. The content is stored online at Office.com, so your notes can be accessed by you from any computer or mobile device. You can even share your notebooks with others and collaborate.
Access OneNote Online
You can access OneNote Online through a web browser by going to Office.com, where you can open, create, edit, store, and share your notes. Your content is stored online with your Office 365 account.
Download and set up OneNote apps