Fin du support pour Exchange Server 2016/2019

Maxime Hiez
Exchange
15 Oct, 2025

Introduction

As of yesterday (October 14, 2025), Exchange Server 2016 and Exchange Server 2016 are no longer supported by Microsoft. Stability / performance bug fixes and security updates will no longer be deployed. Your servers will continue to work, but without official support, you are exposing yourself to vulnerabilities and technical issues.

What options are available to stay secure ?

Microsoft recommends two approaches :

Migrate to Microsoft Exchange Online

This is the simplest and most cost-effective solution. By switching to Exchange Online, you benefit from :

A scalable and secure platform
Advanced features like Copilot for productivity
Native integration with Microsoft 365

Upgrade to Exchange Server Subscription Edition (SE)

Available since July 2025, this edition allows businesses that wish to remain on-premises to continue using Exchange with a subscription model.

If you are currently using Exchange 2019, you can upgrade in-place to SE.
If you are currently using Exchange 2015, it is recommended that you first migrate to 2019, then to SE.

Conclusion

The end of support for Exchange Server marks an important step in the transition to modern solutions. Whether you choose Exchange Online or Exchange SE, the goal is clear : to ensure the security, performance, and continuity of your communications. The future is cloud-based and AI-powered — and it’s time to make the leap.