October 2025 Patch Tuesday: Microsoft’s End of the Decade Update
End-of-Life (EOL) Software - October 2025 patch tuesday
Table of Contents
This document summarizes the end-of-life facts for several Microsoft products as of October 2025,based on the provided text.
Key Takeaways
* Multiple Microsoft products are reaching their end-of-life this month. This includes Windows 10, Office 2016, Office 2019, Exchange Server 2016, and Exchange Server 2019.
* Migration to newer versions is strongly recommended to maintain security and functionality.
* Extended Security Updates (ESU) will be available for Windows 10 after this Patch Tuesday.
Microsoft Office
| version | Final Update | Migration Options | Support Until |
|---|---|---|---|
| Office 2016 | This Month | Office 2024, Office LTSC 2024, Microsoft 365 Apps | October 2024 |
| Office 2019 | This Month | Office 2024, Office LTSC 2024, Microsoft 365 Apps | October 2024 |
| Office 2024 / LTSC 2024 | N/A | N/A | October 2029 |
Notes:
* Office LTSC 2024 is designed for specialized devices with limited connectivity.
* Microsoft 365 Apps offers extensive security and ongoing feature upgrades.
* Prioritize updating applications like Project and Outlook.
microsoft Exchange Server
| Version | Final Update | Migration Options |
|---|---|---|
| Exchange Server 2016 | This Month | Exchange Online, exchange Server Subscription Edition |
| Exchange Server 2019 | This Month | Exchange Online, Exchange Server Subscription Edition |
Notes:
* Migrating to Office 365 Apps suggests migrating to Exchange Online.
* Exchange Server Subscription Edition (SE) was introduced in July 2024.
* Exchange Server SE CU1 is expected to be released this month.
* A detailed roadmap for upgrading from Exchange Server 2019 to Exchange Server SE was provided in 2024.
Microsoft Windows
* Windows 10: Reached end of life this month, but will receive Extended Security Updates (ESU).
* Release Date: July 29, 2015
* significance: Marked a shift in Microsoft’s strategy towards a SaaS model with annual version updates.
* Replacement: Internet Explorer was replaced with Microsoft Edge.
Further Information
* Microsoft Office Upgrade Planning: https://learn.microsoft.com/en-us/microsoft-365-apps/end-of-support/plan-upgrade-older-versions-office#upgrade-from-office-2016-or-office-2019-to-microsoft-365-apps
* Exchange Online: https://learn.microsoft.com/en-us/exchange/exchange-online
* Exchange Server Upgrade: https://techcommunity.microsoft.com/blog/exchange/upgrading-your-organization-from-current-versions-to-exchange-server-se/4241305
* Exchange Server Roadmap: https://techcommunity.microsoft.com/blog/exchange/exchange-server-roadmap-update/4132742
* Windows 10 ESU: https://www.helpnetsecurity.com/2025/09/25/windows-10-extended-security-updates-europe/