Discovery report

How OneNote+ finds notebooks. Every time you open the app it asks Microsoft for:

1. Every notebook in your OneDrive (/me/onenote/notebooks)
2. Every notebook you've opened recently, anywhere (getRecentNotebooks)
3. The notebooks in every Team you belong to, including class notebooks
4. The SharePoint site or OneDrive behind any recent notebook not found above

Results are merged by their web address, so a notebook found in several places shows once. All pages of results are followed (@odata.nextLink).