October 14, 2025 OneNote 2016 will be retired and Microsoft will end support
On April 15, 2024, Microsoft employees announced in a blog post that Office 2016 and Office 2019 will be retired at the same time on October 14, 2025.
https://techcommunity.microsoft.com/t5/office-end-of-support-blog/key-end-of-support-dates-for-office-2016-2019-apps-amp/ba-p/4095876
In the above product list, it is clearly mentioned that OneNote 2016 is included.
https://techcommunity.microsoft.com/t5/office-end-of-support-blog/key-end-of-support-dates-for-office-2016-2019-apps-amp/ba-p/4095876
Key End of Support dates for Office 2016, 2019 Apps & Productivity Servers
This post applies to:- Office 2016, Office 2019 Applications: Access 2016, Access 2019, Excel 2016, Excel 2019, OneNote 2016, Outlook 2016, Outlook 2019, PowerPoint 2016, PowerPoint 2019, Project 2016, Project 2019, Publisher 2016, Publisher 2019, Skype for Business 2016, Skype for Business 2019, Visio 2016, Visio 2019, Word 2016, Word 2019
- Productivity Servers: Exchange Server 2016, Exchange Server 2019, Skype for Business Server 2015, Skype for Business Server 2019
In the above product list, it is clearly mentioned that OneNote 2016 is included.
What does end of support mean?
All of the above applications and servers (including Office 2016, Office 2019) will reach the end of support (EOS) on October 14, 2025. After this end date, Microsoft will no longer provide security fixes, bug fixes, or technical support. Using products after end of support leaves your organization vulnerable to potential security threats, productivity losses, and compliance issues.