MS-203T00: Microsoft 365 Messaging

Duration: 5 Days (40 Hours)

MS-203T00: Microsoft 365 Messaging Course Overview:

Microsoft 365 Messaging (MS-203)

This course is designed to provide you with the knowledge and skills you need to effectively administer and manage Microsoft 365 messaging. You will learn how to configure and manage mail flow, implement security measures, ensure compliance, and troubleshoot messaging problems.

The course covers the following key elements:

  • Message Transport and Mail Flow
    • Configure and manage mail flow in Microsoft 365.
    • Implement transport rules and policies.
    • Troubleshoot mail flow problems.
  • Messaging Security
    • Implement security measures to protect your messaging environment.
    • Use threat intelligence to identify and mitigate threats.
    • Investigate and respond to security incidents.
  • Messaging Hygiene and Compliance
    • Implement messaging hygiene measures to protect your users from spam and malware.
    • Configure compliance policies to ensure that your messaging environment meets regulatory requirements.
  • Messaging Infrastructure
    • Understand the messaging infrastructure in Microsoft 365.
    • Plan and implement a hybrid messaging deployment.
  • Hybrid Messaging
    • Configure and manage a hybrid messaging deployment.
    • Migrate mailboxes to Microsoft 365.

By the end of this course, you will be able to:

  • Configure and manage mail flow in Microsoft 365.
  • Implement security measures to protect your messaging environment.
  • Ensure compliance with regulatory requirements.
  • Troubleshoot messaging problems.
  • Configure and manage a hybrid messaging deployment.

This course is ideal for IT professionals who are responsible for administering and managing Microsoft 365 messaging. It is also a valuable resource for anyone who wants to learn more about Microsoft 365 messaging administration.

Audience Profile

The Messaging Administrator plans, deploys, configures, troubleshoots, and secures the messaging infrastructure in a hybrid and cloud enterprise environment. Responsibilities include managing recipients, mailboxes, transport, mail flow, administrative roles, threat protection, compliance, migrations, and client connectivity. To implement a secure hybrid topology that meets the business needs of a modern organization, the Messaging Administrator must collaborate with other workload administrators and the Microsoft 365 enterprise administrator. The Messaging Administrator should have a working knowledge of authentication types, licensing, and integration with Microsoft 365 applications.

Job role: Administrator

Manage mail flow
  • Manage mail flow in Exchange organizations.
  • Understand mail flow for Exchange Servers.
  • Manage mail flow for Exchange Online.
  • Describe and manage mail flow in hybrid environments.
  • Configure message transport options.
  • Configure SMTP domains (Remote and Accepted domains)
  • Configure connectors
  • Understand how to troubleshoot SMTP mail flow issues.
  • Describe how to troubleshoot issues with a shared namespace.
  • Describe how to troubleshoot Transport Layer Security encryption issues.
  • Troubleshoot network-based issues.
  • Understand how the service health dashboard can be utilized to review active and ongoing service-related issues.
  • Understand how Alert policies can be used to troubleshoot mail flow issues.
  • Understand what mail flow rules are.
  • Describe how mail flow rules work.
  • Configure custom mail flow rules.
  • Explain the use and features of Exchange Online Protection.
  • Plan message routing for Exchange Online Protection.
  • Investigate the available EOP reports and logs that enable organizations to monitor message hygiene.
  • Define mail flow rules that apply encryption templates to encrypt email messages.
  • Understand the different message header fields relevant for spam and spoofing protection.
  • Configure anti-spam and anti-malware filters in Exchange Server.
  • Manage extra features for outbound spam filtering and quarantine.
  • Implement protection features against phishing and spoofing.
  • Create transport rules for custom requirements.
  • Describe the threat protection features of Microsoft Defender for Office 365.
  • Understand how the Configuration analyzer reviews threat protection policies and provides suggestions for improvement.
  • Describe the protection provided by Safe Attachment and Safe Links policies.
  • Understand the spoof intelligence features provided by Exchange Online Protection.
  • Describe how Microsoft Defender anti-phishing policies work.
  • Understand the process to manage the Tenant Allow/Block list in Microsoft 365 Defender.
  • Run realistic attack scenarios using Attack Simulator to help identify vulnerable users before a real attack impacts your organization.
  • Describe different policy and compliance features for messaging.
  • Evaluate the different administrator roles in Microsoft 365.
  • Plan retention policies for Exchange Online mailboxes.
  • Create message traces to understand the mail flow in your Exchange Online organization.
  • Describe how sensitivity labels let you classify and protect your organization’s data.
  • Create and manage inactive mailboxes.
  • Describe what in-place archiving is and how it works.
  • Understand the differences between journaling and archiving.
  • Identify how mailbox and administrator audit logs are used.
  • Design content searches to search for messages in your organization.
  • Describe eDiscovery cases and in-place eDiscovery for Exchange.
  • Configure password policy options.
  • Configure self-service password management.
  • Implement multifactor authentication.
  • Plan password policies.
  • Configure modern authentication in Exchange Online.
  • Configure conditional access policies.
  • Configure workload policies and throttling.
  • Configure quota configurations.
  • Deploy Microsoft 365 Integrated apps.
  • Provide an overview of Exchange federated delegation sharing features.
  • Describe federated sharing components.
  • Identify considerations for designing and implementing federation trusts and certificates.
  • Implement organization relationships.
  • Implement sharing policies.
  • Describe how RBAC is used to assign roles to users.
  • Understand management role groups and their administrative tasks.
  • Assign the built-in management roles for messaging administration.
  • Create custom management roles and assign them through role assignment policies to users.
  • Troubleshoot RBAC management roles.
  • Describe how Privileged Identity Management enables you to manage, control, and monitor access to important resources in your organization.
  • Describe the built-in end-user roles.
  • Configure role assignment policies.
  • Create new custom roles and role assignment policies.
  • Identify the differences between shared permissions and split permissions.
  • Describe multi-forest permissions.
  • Identify the differences between the permission models.
  • Describe the different recipient objects in Exchange.
  • Examine how organizations use resource mailboxes.
  • Compare shared mailboxes to linked mailboxes.
  • Describe how recipients can be grouped together to improve collaboration.
  • Examine how organization us public folders.
  • Manage mailbox settings.
  • Manage resource mailboxes and shared mailboxes.
  • Create and manage mail contacts and mail users.
  • Manage permissions for recipients.
  • Create and manage groups.
  • Create and manage public folders.
  • Describe address lists.
  • Create and manage address lists.
  • Describe address book policies.
  • Configure offline address books.
  • Describe email address policies.
  • Describe connection options that are available for connecting on-premises Exchange to Microsoft 365.
  • List and describe components of a hybrid deployment.
  • Describe Azure Active Directory Connect (Azure AD Connect).
  • Identify Microsoft 365 identity options for Exchange hybrid.
  • Compare Exchange delegated federation to OAuth.
  • Plan for Exchange Hybrid configuration.
  • Describe Organization Configuration Transfer.
  • Explain Exchange Modern Hybrid and Hybrid Agent.
  • Plan mail flow options for a hybrid deployment.
  • Describe the prerequisites to run the Microsoft 365 Hybrid Configuration Wizard.
  • Explain best practices for implementing a hybrid deployment.
  • Describe the migration and coexistence strategies with Exchange Online.
  • Describe considerations that affect which migration option to use.
  • Determine whether DNS MX records must be changed during a mailbox migration.
  • Describe the requirements for an IMAP migration and how it’s carried out.
  • Move mailbox data using an IMAP migration.
  • Plan for a cross-tenant mailbox migration.
  • Prepare target user objects for a cross-tenant migration.
  • Troubleshoot directory synchronization.
  • Troubleshoot pass-through authentication and single sign-on.
  • Troubleshoot transport with Exchange Online.
  • Troubleshoot client access in coexistence.
  • Troubleshoot the Mailbox Replication service.

MS-203T00: Microsoft 365 Messaging Course Prerequisites:

This course is designed for persons who are aspiring to the Microsoft 365 Messaging Administrator role.

Q: What is MS-203: Microsoft 365 Messaging?

A: MS-203 is a training course that focuses on messaging infrastructure in Microsoft 365. It covers the planning, deploying, and managing of Microsoft Exchange Online, Exchange Server hybrid deployments, and security and compliance features in Microsoft 365 messaging.

A: This MS203 training covers a range of topics, including planning and deploying Exchange Online, managing recipients and mailboxes, configuring mail flow, securing messaging environments, implementing hybrid deployments, and managing security and compliance features in Microsoft 365 messaging.

A: MS-203 is designed for messaging administrators, messaging architects, and IT professionals who are responsible for managing and deploying messaging infrastructure in Microsoft 365. It is also suitable for individuals preparing for the Microsoft 365 Certified: Messaging Administrator Associate certification.

A: It is recommended that participants have a solid understanding of messaging concepts, experience with Exchange Server and Exchange Online administration, and familiarity with general Microsoft 365 concepts and administration.

A: By the end of this training, you will have the knowledge and skills to plan, deploy, and manage messaging infrastructure in Microsoft 365. You will learn how to configure Exchange Online, manage recipients and mailboxes, implement mail flow, secure messaging environments, set up hybrid deployments, and manage security and compliance features.

A: MS-203 includes hands-on exercises and labs that provide practical experience in managing and deploying messaging infrastructure in Microsoft 365. You will have the opportunity to apply the concepts learned in simulated environments, gaining valuable hands-on skills.

Discover the perfect fit for your learning journey

Choose Learning Modality

Live Online

  • Convenience
  • Cost-effective
  • Self-paced learning
  • Scalability


  • Interaction and collaboration
  • Networking opportunities
  • Real-time feedback
  • Personal attention


  • Familiar environment
  • Confidentiality
  • Team building
  • Immediate application

Training Exclusives

This course comes with following benefits:

  • Practice Labs.
  • Get Trained by Certified Trainers.
  • Access to the recordings of your class sessions for 90 days.
  • Digital courseware
  • Experience 24*7 learner support.

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