We wanted to let you know about Exchange Online ActiveSync Certificate-based Authentication endpoint changes.

We wanted to let you know of an Active Directory replication issue you might run into if you use Windows Server 2025 schema master role.

We are happy to announce the time-based archiving feature for Exchange Online users with archives.

We will make a change to management of "Contact" Recipient Type objects in Exchange Online.

A reminder that on September 16 2025, we will enforce the first temporary block of shared security principal use for our hybrid customers.

We have released Hotfix Updates for Exchange Server Subscription Edition (SE), 2019 and 2016.

We are announcing that all Exchange Online customers who send external email should start switching to custom (aka vanity) domain names.

We are excited to announced a feature that enables cloud management of email properties for users with remote mailboxes.

We have released Security Updates for Exchange Server SE, Exchange Server 2019 and Exchange Server 2016.