Security Bulletin: End of Support for Microsoft Exchange Server 2016 and 2019
Release Date: February 20, 2025 Bulletin ID: Exchange 2016 and 2019 End of Support Severity: Advisory Impact: Security Risks, Lack of Support Summary Microsoft has announced the End of Support (EOS) for Exchange Server 2016 on October 14, 2025. Exchange Server 2019 remains the last on-premises version of Exchange, but customers should be aware of lifecycle policies and support timelines to ensure security and compliance. After the EOS date, Exchange Server 2016 will no longer receive security updates, bug fixes, or technical support, which could leave organizations vulnerable to security threats and compliance issues. Organizations should take proactive steps to plan their migration strategy to ensure continued security and support. Next Steps for Customers Migrate to Exchange Online (Recommended) Microsoft recommends migrating to Exchange Online as part of Microsoft 365. This ensures: - Automatic updates and security patches - Lower maintenance overhead - Cloud-based collaboration and enhanced security features Upgrade to Exchange Server Subscription Edition (If Remaining On-Premises) Exchange Server 2019 is…