I store my onenote notebooks in a folder on onedrive. I make extensive use of the Share a page feature in onenote. Share a page works by clicking on the share button in the upper right, setting the link to read only, then copying the created link onto my blog or class management websites. Clicking on the link allows anyone to read that page of my notebook.
Now, clicking on the share button brings up an option to let me create an email invitation to share the entire notebook. Not what I want or am used to.
I am using Windows 10, the universal app version of onenote, and I believe that I have the commercial version of a windows license. I did recently add another computer to my license - a Microsoft Surface which I use occasionally. Share on the Microsoft Surface works correctly, generating a URL and allowing me to copy the URL to the clipboard.