Most RecentNewest TopicsMost LikesMost ViewedExchange servers may become unstable after installation of October 2026 Windows updates More information related to issues that some Exchange servers might experience after installation of October 2026 Windows updates. Updated Exchange Online SMTP AUTH Basic Authentication Deprecation Timeline We wanted to provide the updated Exchange Online SMTP AUTH Basic Authentication Deprecation Timeline. Released: October 2026 Exchange Server Security Updates We have released October 2026 Security Updates for Exchange Server SE. Exchange Server 2019 and 2016 ESU updates only. Released: September 2026 Exchange Server Security Updates We have released Security Updates for Exchange Server SE. Exchange Server 2019 and 2016 ESU updates only. 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. Action Required: Upgrade ExchangeOnlineManagement PowerShell Module to Version 3.10.1 or Newer We wanted to let you know that you should update your Exchange Online PowerShell module over the next several months. Reminder: Exchange 2016 and 2019 ESU Program Ends in October 2026 We wanted to provide a reminder that Exchange 2016 and 2019 ESU program ends in October 2026. Update Your Exchange SE Hybrid On-premises Rich Coexistence to Graph Configure Exchange Server SE to move your Hybrid rich coexistence scenarios to Graph API calls. Released: August 2026 Exchange Server Security Updates We have released Security Updates for Exchange Server SE. Exchange Server 2019 and 2016 ESU updates only. Retirement of Direct Exchange ActiveSync Certificate-Based Authentication by End of 2026 We are announcing the deprecation of Exchange ActiveSync (EAS) certificate-based authentication (CBA) directly to Exchange Online.
