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Microsoft 365 Messaging (MS-203) Practice Exam - RETIRED

Microsoft 365 Messaging (MS-203) 


About Microsoft 365 Messaging (MS-203) Practice Exam

The candidates preparing for the Microsoft 365 Messaging (MS-203) Exam work as messaging administrators responsible to plan, deploy, configure, troubleshoot, and secure the messaging infrastructure in hybrid and cloud enterprise environments. 


Roles and Responsibilities

As a Messaging administrators you will be responsible for -

  • Managing recipients, mailboxes, transport, mail flow, administrative roles, threat protection, compliance, migrations, and client connectivity. 
  • Collaborate with other workload administrators and the Microsoft 365 enterprise administrator
  • Implement a secure hybrid or cloud-only messaging topology that meets the business needs of an enterprise.  


Skills and Knowledge Required

As a messaging administrator candidate should have a working knowledge of -

  • Authentication types
  • Licensing
  • Integration with Microsoft 365 applications
  • Microsoft Azure Active Directory (Azure AD), part of Microsoft Entra.


MS-203 Course Outline

The Microsoft 365 Messaging (MS-203)  exam covers the latest exam updates and topics as per exam updates on May 2, 2023 -

Domain 1 - Understand to Manage organizational settings and resources (15–20%)

1.1 Planning and managing organizational settings and client connectivity

  • Learn to Manage a Global Address List (GAL)
  • Learn to Manage an Offline Address Book (OAB)
  • Learn to Manage address book policies
  • Learn to Manage email address policies
  • Learn to Plan and configure organization relationships and individual sharing
  • Learn to Configure virtual directories and URLs in a hybrid environment
  • Learn to Configure global Outlook on the Web policies
  • Learn to Troubleshoot by using the Microsoft Support and Recovery Assistant (SaRA)


1.2 Managing recipient resources

  • Learn to Manage resource mailboxes
  • Learn to Manage groups including distribution lists, dynamic distribution lists, mail-enabled security groups, and Microsoft 365 groups
  • Learn to Create and manage group naming policies
  • Learn to Manage user mailboxes
  • Learn to Manage mailbox permissions, including delegation
  • Learn to Manage mailbox Mailflow settings
  • Learn to Manage shared mailboxes, including converting to a shared mailbox
  • Learn to Create and manage contacts, including mail contacts and mail users
  • Learn to Create and manage public folders


Domain 2 - Understand to Plan and manage the mail transport architecture (30–35%)

2.1 Planning and configuring connectors

  • Learn to Plan connectors for mail flow
  • Learn to Create and configure connectors to route mail
  • Learn to Create and configure connectors to secure mail flow between organizations
  • Learn to Configure enhanced filtering for connectors in Microsoft 365 Defender
  • Learn to Manage and secure flow of internal and internet mail
  • Learn to Manage mail flow rules
  • Learn to Manage accepted and remote domains
  • Learn to Manage hybrid mail flow
  • Learn to Identify the appropriate DNS MX record for a specific scenario
  • Learn to Plan and implement Sender Policy Framework (SPF) and Domain-based Message Authentication, Reporting and Conformance (DMARC)
  • Learn to Plan and implement Domain Keys Identified Mail (DKIM)


2.2 Troubleshooting mail flow

  • Learn to Configure and manage alert policies
  • Learn to Trace a message
  • Learn to Analyze a message trace
  • Learn to Analyze message headers
  • Learn to Analyze Non-Deliverable Reports (NDRs)
  • Learn to Troubleshoot by using the Microsoft Remote Connectivity Analyzer
  • Learn to Troubleshoot by using transport logs and queues in a hybrid environment


Domain 3 - Plan and implement a hybrid configuration and migration (15–20%)

3.1 Planning and implementing a hybrid environment

  • Learn to Plan a hybrid deployment by using the Hybrid Configuration Wizard (HCW)
  • Learn to Manage the Edge server role in a hybrid environment
  • Learn to Configure the environment by using the Hybrid Configuration Wizard
  • Learn to Deploy the Exchange Hybrid Agent
  • Learn to Manage the Exchange certificates lifecycle in a hybrid environment


3.2 Planning and implementing migration

  • Learn to Evaluate migration methods, including minimal hybrid (express migration), remote move, cutover, cross tenant, staged, PST Imports, IMAP, and Google Workspace
  • Learn to Configure migration endpoints
  • Learn to Create and manage a migration batch
  • Learn to Specify cross-tenant migration requirements
  • Learn to Troubleshoot mailbox migration


Domain 4 - Secure the messaging environment (25–30%)

4.1 Managing role-based permissions in Exchange

  • Note: Exchange-related roles only
  • Learn to Plan RBAC roles
  • Learn to Manage default and custom admin role groups
  • Learn to Manage user roles


4.2 Securing messages by using Microsoft 365 Defender

  • Learn to Configure and manage Anti-phishing policies
  • Learn to Configure and manage Anti-spam policies
  • Learn to Configure and manage Anti-malware policies
  • Learn to Configure and manage Safe Attachments
  • Learn to Configure and manage Safe Links
  • Learn to Configure Tenant Allow/Block lists
  • Learn to Configure and manage quarantine policies
  • Learn to Investigate messaging threats by using Microsoft 365 Defender Explorer and Advanced hunting
  • Learn to Manage user-reported message settings
  • Learn to Validate settings by using Configuration analyzer


4.3 Managing compliance

  • Learn to Configure retention tags and retention policies for a specific mailbox folder
  • Learn to Enable and configure archive mailboxes
  • Learn to Analyze audit logs
  • Learn to Manage journal rules
  • Learn to Manage content search
  • Learn to Manage standard eDiscovery cases (not including Premium eDiscovery)


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  • Each set in the practice exam contains unique questions built with the intent to provide real-time experience to the candidates as well as gain more confidence during exam preparation.
  • Practice exams help to self-evaluate against the exam content and work towards building strength to clear the exam.
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