MS-203: Microsoft 365 Exchange Messaging


Microsoft Course Demo

MS-203: Microsoft 365 Exchange Messaging

In this instructor-led, online training course, students will learn the key elements of Microsoft 365 messaging administration, including message transport and mail flow, messaging security, hygiene, and compliance, messaging infrastructure, and hybrid messaging. This course is designed for IT professionals who deploy and manage the messaging infrastructure for Microsoft 365 in their organization.

Exams: MS-203


Doug Bassett, MCITP, MCSE, MCT

Course Information

Skills Learned

After completing this online training course, students will be able to:

  • Configure and manage the transport pipeline
  • Manage and troubleshoot mail flow and transport issues
  • Manage message hygiene and compliance

Who Should Attend This Course

This course is meant for messaging administrators who deploy, configure, manage, and troubleshoot recipients, permissions, mail protection, mail flow, and public folders in both on-premises and cloud enterprise environments.


None, but it is recommended that students have:

  • Two years of experience administering Windows Server, including Windows Server 2012 R2 or Windows Server 2016
  • Two years of experience working with Active Directory Domain Services (AD DS). Two years of experience working with name resolution including Domain Name System (DNS)
  • Understanding of TCP/IP and networking concepts
  • Understanding of Windows Server 2012 R2 or later, and AD DS, including planning, designing, and deploying
  • Understanding of security concepts such as authentication and authorization

Course Outline

  • Modern Messaging Infrastructure
  • Recipient Objects and Resources
  • Mailbox Databases
  • Organizational Settings
  • Client Access
  • Mobile Devices
  • Transport Pipeline
  • Mail Flow
  • High Availability
  • Disaster Recovery
  • Public Folders
  • Mailbox Migrations
  • Hybrid Environments
  • Deploying and Troubleshooting Hybrid Environments
  • Message Hygiene
  • Compliance
  • Role-Based Access Control


March 1, 2021
11:00 am – 2:00 pm ET
Week 1 of 2: Monday – Thursday
Week 2 of 2: Monday – Thursday

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