Exchange Server SE explained – Help for the Upgrade

Exchange Server SE (Subscription Edition) is the next version of Microsoft’s on-premises email server. Instead of one-time license payments, Microsoft will rely more on its subscription-based license model. Companies will pay regularly for updates, security fixes, and support. This shift aligns with Microsoft’s recent trend of favoring subscription-based models.

As of October 14, 2025, support for Exchange 2016 and Exchange 2019 will end, meaning that Microsoft will no longer provide security updates for these versions. Once support ends, any security vulnerabilities that arise will remain unpatched, making your infrastructure increasingly vulnerable to cyberattacks. Switching to Exchange Server SE is therefore essential to continue receiving regular support and security updates.

We are also happy to advise you on the alternatives!

Exchange Server SE provides companies with a reliable alternative to the previous versions. The subscription-based model ensures continuous support, regular updates and the necessary security for your IT infrastructure. Particularly important is the continuous protection against new security vulnerabilities, which is guaranteed by the subscription model.

Migrating from older Exchange versions (Exchange 2016 or Exchange 2019) to Exchange Server SE is not always as straightforward as Microsoft makes it out to be in their blogs. (See: Upgrading your organization from current versions to Exchange Server SE)
There are often technical and operational challenges that require careful planning.

Click here for the complete Exchange Upgrade Roadmap: Microsoft Exchange Upgrade Roadmap

If you want to migrate from Exchange 2016 or Exchange 2019 to Exchange Server SE, we can support you with our expertise. We can help you make the transition smoothly and securely and offer you alternatives if Exchange Server SE is not the ideal solution for your company.