Traditionally, Microsoft offered two distinct versions of the app: OneNote for Windows 10 (a lightweight UWP app) and the OneNote desktop app
Once installed, OneNote is designed to be fully functional without an internet connection. Use the Office offline installer - Microsoft Support microsoft onenote offline installer
: Changes made while offline are stored locally and will automatically sync to as soon as a connection is restored. Mobile Devices : On iPad or iPhone, ensure Auto Sync Attachments ensure Auto Sync Attachments