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.

We are announcing enforcements to move customers along to using the dedicated hybrid app.

This post discusses what Direct Send is, is not, and how to help control email sent directly to your tenant.

We wanted to let you know about AI powered tools to help you migrate your EWS apps before Exchange Online EWS deprecation.

Starting in October 2025, you will not be able to migrate public folders to Exchange Online using native Microsoft tools.

We are announcing an optional 6-month Extended Security Update (ESU) program for Exchange 2016 and 2019.