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Exam Code: MS-203

Exam Name: Microsoft 365 Messaging

Updated: Jul 29, 2026

Number: 396 Q&As with Testing Engine

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How to Prepare for MS-203 Test

These courses will support you in developing the skills relevant to passing the Microsoft MS-203 exam and earning the associated certification:

Secure the Microsoft 365 Messaging environment
This segment of the official learning path centers on how to protect your Microsoft Exchange Online environment using role-oriented permissions, compliance problems, and Microsoft’s Advanced Threat Protection. It’s 1 hour 41 minutes long and contains three modules.
Devise a Microsoft 365 Messaging hybrid migration as well as configuration
This is one of three free official courses targeted at helping you develop the skills needed to qualify as a pro-level messaging administrator. It zeros in on helping you grasp hybrid environments for messaging, tools, migration types, and the management of varied public folders. This course is three modules wide and 84 minutes long. Note, you're expected to have basic-level skills in Microsoft 365 before taking this training.
Monitor Microsoft 365 messaging organizational settings and architecture
This is the second class in the Microsoft 3-part learning path series. It teaches one how to monitor the Microsoft Exchange Online messaging framework in on-premises, cloud, and hybrid environments in a company. This course consists of 7 modules and has a total runtime of 3 hours 31 minutes.
Microsoft 365 Messaging
This is a paid instructor-led training offered by Microsoft. The course runs for five days and delves extensively into the main elements of Microsoft 365 messaging administration. These elements include message transport and mail flow, messaging security, messaging infrastructure, hygiene, compliance, and hybrid messaging. There are no perquisites to taking this class.

Microsoft MS-203 Exam Overview:

Certification Vendor:	Microsoft
Exam Name:	Microsoft 365 Messaging
Exam Number:	MS-203
Certificate Validity Period:	2 years
Exam Price:	$165 USD
Exam Duration:	120–150
Real Exam Qty:	40–60
Exam Format:	Multiple-choice, Case studies, Drag-and-drop, Build list, Active screen
Passing Score:	700 out of 1000
Available Languages:	English, Japanese, Chinese (Simplified), Korean, German, French, Spanish, Portuguese (Brazil), Chinese (Traditional), Italian
Recommended Training:	Microsoft Learning Path: Microsoft 365 Messaging
Exam Registration:	Microsoft Learn Exam Page Pearson VUE Registration
Sample Questions:	Microsoft MS-203 Sample Questions
Exam Way:	Proctored online or at authorized Pearson VUE test centers; exam retired December 31, 2023
Pre Condition:	No mandatory prerequisites; recommended experience with Microsoft 365, Exchange Online, PowerShell, and identity management
Official Syllabus URL:	https://learn.microsoft.com/en-us/credentials/certifications/exams/ms-203/

Skills measured

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

Reference: https://docs.microsoft.com/en-us/learn/certifications/exams/ms-203

Planning and Managing the Mail Architecture

This domain will confirm if an exam-taker is familiar with the concepts of planning and configuring transport architecture as well as managing and troubleshooting mail flow. To better prepare for the test, applicants should first understand how to analyze a message trace, manage domains, validate different types of mail flow, analyze NDRs, use specific Microsoft tools for troubleshooting, and plan connectors, among other technical tasks.

Microsoft MS-203 Exam Syllabus Topics:

Section

Weight

Objectives

Plan and manage mail transport architecture

25–30%

- Plan and configure connectors

1. Configure cross-tenant connectors
2. Create and manage inbound/outbound connectors
3. Implement enhanced filtering

- Manage mail flow

1. Implement email authentication: SPF, DKIM, DMARC
2. Configure hybrid mail flow
3. Create and manage transport rules

- Troubleshoot mail flow

1. Use connectivity analyzers
2. Interpret NDRs and transport logs
3. Perform message trace and analyze headers

Secure the messaging environment

25–30%

- Manage permissions and security

1. Manage audit logging and reporting
2. Implement data governance
3. Configure RBAC and admin roles

- Manage compliance

1. Configure data loss prevention (DLP)
2. Manage eDiscovery and content search
3. Implement retention and journal rules

- Implement threat protection

1. Manage Microsoft Defender for Office 365
2. Configure anti-malware and anti-spam policies
3. Set up quarantine policies

Manage Microsoft Exchange Online settings and resources

40–45%

- Plan and manage client access

1. Manage certificates and authentication
2. Troubleshoot client connectivity
3. Configure Autodiscover and virtual directories
4. Manage Outlook on the web and mobile device policies

- Manage recipients and resources

1. Implement archive mailboxes and retention policies
2. Manage email addresses and forwarding
3. Manage resource mailboxes and permissions
4. Create and manage mailboxes, groups, and contacts

- Manage organizational settings

1. Manage accepted and remote domains
2. Configure email address policies
3. Manage address lists and address book policies
4. Configure organizational sharing and relationships

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