Exchange Online Basics – How Email Works in Microsoft 365

In today’s business environment, email remains a critical communication tool—and increasingly, it’s running entirely in the cloud. If your organization uses or is considering using Exchange Online as part of Microsoft 365 (or even standalone), it’s helpful to understand how email works in that context: what happens behind the scenes, what you need to set up, and how to ensure things run smoothly and securely.

This article guides you through the basics of Exchange Online mail flow, architecture, administration, and security.

 

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