A family of Microsoft products that enable users to capture, organize, and reuse notes electronically.
Hello,
Are you signed into the OneNote desktop app with the same work account that owns the notebook? The recent Microsoft update limits shared work notebooks opened by personal accounts, so the Open in App option only appears when you use the work account on the desktop app. Personal accounts open these shared work notebooks only in the browser or mobile app.
If you need desktop access, sign into OneNote on your laptop using the work account then add the notebook from there.