Microsoft 365 messaging administrators plan, deploy, configure, troubleshoot, and secure the messaging infrastructure in hybrid and cloud enterprise environments.

They’re responsible for managing recipients, mailboxes, transport, mail flow, administrative roles, threat protection, compliance, migrations, and client connectivity.

Messaging administrators collaborate with other workload administrators and the Microsoft 365 enterprise administrator to implement a secure hybrid or cloud-only messaging topology that meets the business needs of an enterprise.

The messaging administrator should have a working knowledge of authentication types, licensing, and integration with Microsoft 365 applications.