Microsoft's End of Support for Exchange 2016 and 2019: What IT Teams Must Do Now
Microsoft will end support for Exchange Server 2016 and 2019 on October 14, 2025, exposing organizations to security vulnerabilities and compliance risks.
Upcoming support lifecycle milestones for older on-premises products - Azure DevOps Blog
Customers are encouraged to start planning and deploying upgrades now to ensure that installed products remain supported and secure, and to take advantage of new capabilities offered in successor products.