Most RecentMost LikesMost ViewedAddressing Exchange Server May 2026 vulnerability CVE-2026-42897 We wanted to tell you how to address the Exchange Server May 2026 vulnerability CVE-2026-42897. Upgrading your organization from current versions to Exchange Server SE We wanted to provide additional guidance and FAQ for preparing your organizations for Exchange Server SE release. Announcing Period 2 Exchange 2016/2019 Extended Security Update (ESU) program We created a Period 2 ESU for Exchange customers who need extra time to migrate to Exchange SE. No Exchange Server Security Updates for May 2026 We are not releasing any Exchange Server Security Updates for May 2026. No Exchange Server Security Updates for April 2026 We are not releasing any Exchange Server Security Updates for April 2026. Exchange Server Security Changes for Hybrid Deployments We wanted to announce several security changes that Exchange hybrid customers need to know about. Announcing Exchange 2016 / 2019 Extended Security Update program We are announcing an optional 6-month Extended Security Update (ESU) program for Exchange 2016 and 2019. No Exchange Server Security Updates for March 2026 We are not releasing any Exchange Server Security Updates for March 2026. Released: February 2026 Exchange Server Security Updates We have released Security Updates for Exchange Server SE. Exchange Server 2019 and 2016 ESU updates only. TLS Certificates in Exchange Hybrid - Common Issues & How to Fix them This blog post will help you understand the role of TLS certificates in Exchange hybrid.
