MS-203T00 - Microsoft 365 Messaging

This course examines 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 persons who are aspiring to be Messaging Administrators in a Microsoft 365 deployment.

USD 750

Date : 16 Oct 2023

Code: ms-203t00

Duration: 5.0 days

other dates


Virtual ILT | 16 Oct 2023 - 20 Oct 2023
Virtual ILT | 20 Nov 2023 - 24 Nov 2023
Virtual ILT | 11 Dec 2023 - 15 Dec 2023

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  • Describe the transport components of Exchange.
  • Plan an effective message routing for your organization.
  • Modify message flow for your organization.
  • Describe which transport agents exist and what they do.
  • Configure the different transport options.
  • Plan and set up domains for your organization.
  • Understand how the receive and send connectors work.
  • Understand what transport rules are.
  • Describe how transport rules work.
  • Configure custom transport rules.
  • Describe how transport rules can be used for data loss prevention.
  • 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.
  • 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.
  • Understand how Alert policies can be used to troubleshoot mail flow issues.
  • Troubleshoot network-based issues.
  • Plan troubleshooting procedures for connector and agent issues.
  • Plan troubleshooting procedures for architectural issues.
  • Describe how to troubleshoot transport issues with coexistence.
  • Create searches for the message tracking log.
  • Describe how to troubleshoot using the protocol logs.
  • Understand how to work with the event logging for Exchange.
  • 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.
  • 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.
  • Understand how Advanced Hunting can be used to track events in your secure messaging environment.
  • 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 litigation and in-place holds in Exchange Server.
  • Plan retention and deletion with Message Records Management (MRM).
  • Analyze your Exchange organization's message tracking log.
  • 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 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 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 purpose and functionality of Edge Transport servers.
  • Explain the infrastructure requirements for Edge Transport servers.
  • Describe the Edge Subscription process using EdgeSync.
  • Plan for message flow with an Edge Transport server.
  • Manage a hybrid deployment.
  • Describe when you must configure Public Folder coexistence with Microsoft 365.
  • Explain how to configure Oauth for a mixed Exchange environment.
  • Describe how to configure OneDrive attachments for on-premises mailboxes.
  • 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.
  • 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.
  • Describe the requirements for both cutover and staged migrations.
  • Identify the steps involved in running both cutover and staged migrations.
  • Create and manage migration batches in the Exchange Admin Center.
  • Import PST Files to Exchange Online mailboxes.
  • Migrate Public Folders to Exchange Online.
  • Plan for a cross-tenant mailbox migration.
  • Prepare target user objects for cross-tenant migration.


1. Explore transport services

Examines the different transport components used by Microsoft Exchange, explores how message routing works in an Exchange deployment, and provides instruction on how to configure the message flow for your organization.

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2. Configure message transport

Examines how messaging administrators must configure message transport, reviews the message transport options, and provides instruction on how to configure domains and connectors and implement an approval workflow for messaging.

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3. Manage transport rules

Introduces transport rules in Exchange, examines how transport rules work, and provides instruction on how to configure transport rules to control messaging in an Exchange deployment.

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4. Manage mail flow

Examines the differences between managing mail flow in Exchange Online, Exchange Server, and Exchange Hybrid deployments

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5. Troubleshoot mail flow

This module examines several tools that Microsoft provides to help messaging administrators find and fix the root causes of mail flow issues most commonly experienced by organizations.

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6. Troubleshoot transport issues

Examines common troubleshooting scenarios involving transport components, including connectors, transport agents, architectural issues, and coexistence.

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7. Troubleshoot mail flow using logs

Examines how to use the event, protocol, and tracking logs to troubleshoot service availability and message transport, and when you must find historical data about past issues.

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8. Plan for message security

Examines Exchange Online Protection features and functionality, how to plan messaging routing for this service, and the EOP reports and logs that are available to analyze message hygiene in an organization.

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9. Manage anti-malware and anti-spam policies

Reviews the anti-malware and anti-spam protection provided by Exchange Server and Exchange Online Protection, and examines how to configure spam and malware filters, policies, and settings to provide protection from phishing and spoofing.

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10. Explore threat protection in Microsoft 365 Defender

Examines how Microsoft Defender for Office 365 integrates with EOP to extend the protection provided by EOP and provide the most efficient level of protection against commodity and advanced targeted attacks.

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11. Explore messaging compliance in Microsoft 365

Examines the different Microsoft 365 Purview compliance portal features that messaging administrators can use to comply with legal and regulatory requirements.

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12. Explore messaging compliance in Exchange

Examines the compliance features available in the Exchange Admin Center for Exchange Server and Exchange hybrid deployments.

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13. Manage Exchange Online archiving and auditing

Examines how archiving is maintained within Exchange, how archive storage is provided to users, how messages are automatically processed and archived, and how audit logging provides information about user actions in Exchange mailboxes.

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14. Manage Content Search

Examines how Microsoft 365 uses in-place eDiscovery to run various types of compliance searches across an organization, including content searches and eDiscovery cases.

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15. Manage authentication for messaging

Examines how messaging administrators can ensure that user accounts are well protected and secure without deploying security features that introduce unnecessary complexity in your users’ everyday work.

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16. Configure organizational settings

Examines the Microsoft 365 organizational settings that a messaging administrator can configure, including mailbox quotas to control disk usage on the Exchange Server, and throttling policies to prioritize workloads that affect an organization.

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17. Configure organizational sharing

Examines federation delegation and federated sharing, which messaging admins must implement so their organizations can share information with other trusted organizations.

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18. Manage administrator roles

Examines how messaging administrators manage the Role Based Access Control (RBAC) permissions that are used by both Exchange Server and Exchange Online.

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19. Manage user roles

Examines how to manage user roles using built-in role assignment policies and management role assignment policies, and how to create new roles, role assignments, and scopes.

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20. Analyze role-based permissions

Examines how a messaging administrator must plan and configure shared permissions and split permissions so as not to put their Exchange environment or their entire Active Directory at risk.

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21. Explore the different types of Exchange recipients

Examines the different types of Exchange Server recipients, including mailboxes, Microsoft 365 groups, resources, contacts, public folders, and analyzes how they differ from each other.

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22. Create and manage Exchange recipients

Examines how messaging administrators create and manage Exchange recipients, including mailbox settings, resource mailboxes, shared mailboxes, mail contacts, mail users, recipient permissions, groups, and public folders.

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23. Manage email addresses, lists, and resources

Examines how messaging administrators can create custom address lists, address book policies, email address policies, and offline address books.

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24. Explore Exchange hybrid deployment requirements

Examines the requirements necessary to implement a hybrid deployment, including Azure Active Directory Connect, the options for connecting on-premises Exchange to Microsoft 365, and the Microsoft 365 identity options for Exchange hybrid.

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25. Plan and configure a hybrid deployment using the Hybrid Configuration Wizard

Examines how to plan and implement a hybrid deployment using the Hybrid Configuration Wizard, including configuration options, Organization Configuration Transfer, the Hybrid Agent, mail flow options, and implementation best practices.

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26. Provide a gateway for Internet email using Edge Transport servers

Examines the key features to plan for when implementing Edge Transport servers, including infrastructure requirements, Edge Subscriptions, EdgeSync, and message flow.

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27. Implement advanced hybrid functionality

Examines how to manage a hybrid deployment and implement advanced hybrid functionality, including features that require a successful hybrid deployment, such as Public Folder coexistence and OneDrive attachment storage for on-premises mailboxes.

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28. Troubleshoot hybrid deployments

Examines troubleshooting techniques for a hybrid deployment, including how to troubleshoot Exchange transport, directory synchronization issues with pass-through authentication and single sign-on, client access, and mailbox replication service.

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29. Plan mailbox migrations

Examines the options that are available for migrating email to Exchange Online, such as completing a migration, summarizes the migration and coexistence options, and recommends when to use which option.

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30. Run IMAP migrations

Examines the requirements for running an IMAP migration, the migration options that are available, and the steps that are completed during a migration.

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31. Run cutover and staged migrations

Examines how to plan for cutover and staged migrations, reviews each migration approach, and examines the requirements, planning activities, and migration process for each method.

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32. Run advanced mailbox migrations

Examines how to plan for and run a PST migration, how to run a public folder migration, how to plan for a cross-tenant migration, and how to prepare source user objects for migration.

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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.


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



Skills Measured

  • Manage organizational settings and resources (15-20%)
  • Plan and manage the mail transport architecture (30-35%)
  • Plan and implement a hybrid configuration and migration (15-20%)
  • Secure the messaging environment (25-30%)

Course Benefits

  • Career growth
  • Broad Career opportunities
  • Worldwide recognition from leaders
  • Up-to Date technical skills
  • Popular Certification Badges

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