Microsoft has announced the end of support for OneNote on Windows 10, effective October 14, 2025, as part of its strategy to encourage users to upgrade to Windows 11. Starting June 2025, sync speeds for OneNote on Windows 10 will be deliberately slowed, affecting multi-device access and real-time collaboration. Individual users and businesses relying on the app will experience significant delays. Microsoft offers a migration guide to facilitate the transition to the new OneNote app for Windows 11, ensuring data integrity during the switch.