IT Admin Change Calendar Microsoft 365
Office 2016 and Office 2019 reached end of support on October 14, 2025
Office 2016 and Office 2019 reached end of support on October 14, 2025. The apps keep working but receive no more security updates.
Product
Office 2016 / Office 2019
Announced
14 October 2024
Effective from
14 October 2025
Who is affected
Organizations running perpetual-license Office 2016 or Office 2019 (Word, Excel, PowerPoint, Outlook, and related apps) on managed devices.
Admin roles to involve: Microsoft 365 admin, Desktop/application admin, Security admin
What administrators should do
Move users from perpetual Office 2016 / 2019 to Microsoft 365 Apps or a supported perpetual release. The apps continue to run, but there are no security updates, bug fixes, or support after October 14, 2025. Microsoft published a T-12 month end-of-support announcement for Office suites, applications, and servers on October 14, 2024.
What happens if this is ignored
Office 2016/2019 keeps working but receives no security updates, so document and Outlook clients accumulate unpatched vulnerabilities.
Official source
Prepare now for key end of support moments in 2025
Published by Microsoft · Source dated 14 October 2024 · Checked 24 August 2026
Last verified 24 August 2026
Related changes
- Windows 10 reached end of support on October 14, 2025 (14 October 2025)
- Exchange Server 2016 and 2019 reached end of support on October 14, 2025 (14 October 2025)
- Visio 2016 and Visio 2019 reached end of support on October 14, 2025 (14 October 2025)