A family of Microsoft products that enable users to capture, organize, and reuse notes electronically.
**Update 6/9 6PM PDT:**According to the OneDrive team they've fixed this issue. Please let me know if it recurs.
OneNote Engineer here: We're aware of this problem and working to get it resolved ASAP. Thanks for letting us know!
6/9: We've narrowed it down to a problem with receiving an updated authentication token from OneDrive. This results in OneNote believing you don't have permission to the sections and removing them from display.
Update 6/8: As mentioned above, if you open the notebook in Edge and restart all processes, OneNote 2010 appears to properly get the auth token and sync properly.