Most RecentMost ViewedMost LikesReleased: December 2025 Exchange Server Security Updates We have released Security Updates for Exchange Server SE. Exchange Server 2019 and 2016 ESU updates only. Released: October 2025 Exchange Server Security Updates We have released Security Updates for Exchange Server SE, Exchange Server 2019 and Exchange Server 2016. Announcing Public Preview: Exchange Online Admin API We are announcing the Public Preview of the Exchange Online Admin API. Introducing Exchange Web Services (EWS) Usage Reports in Microsoft 365 Admin Center We are happy to announce two ways of getting Exchange Online Exchange Web Services (EWS) usage reporting. Exchange Online to retire Basic auth for Client Submission (SMTP AUTH) Today, we are announcing that Exchange Online will permanently remove support for Basic authentication with Client Submission (SMTP AUTH) starting March 2026. No Exchange Server Security Updates for November 2025 We are not releasing any Exchange Server Security Updates for November 2025 Introducing more control over Direct Send in Exchange Online Read about a new feature that gives you more control over Direct Send in Exchange Online. Direct Send vs sending directly to an Exchange Online tenant This post discusses what Direct Send is, is not, and how to help control email sent directly to your tenant. Implementing Inbound SMTP DANE with DNSSEC for Exchange Online Mail Flow In May 2024, Microsoft is releasing a Public Preview for Inbound SMTP DANE with DNSSEC for Exchange Online mail flow. Dedicated Hybrid App: temporary enforcements, new HCW and possible hybrid functionality disruptions We are announcing enforcements to move customers along to using the dedicated hybrid app.
