Microsoft 365 Messaging: MS-203 Exam

"Microsoft 365 Messaging", also known as MS-203 exam, is a Microsoft Certification. With the complete collection of questions and answers, PrepPDF has assembled to take you through 396 Q&As to your MS-203 Exam preparation. In the MS-203 exam resources, you will cover every field and category in Microsoft 365 Certified Certification helping to ready you for your successful Microsoft Certification.

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  • Exam Code: MS-203
  • Exam Name: Microsoft 365 Messaging
  • Certification Provider: Microsoft
  • Corresponding Certification: Microsoft 365 Certified
  • Updated: Jul 20, 2026
  • No. of Questions: 396 Questions & Answers with Testing Engine
  • Download Limit: Unlimited

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Microsoft 365 Messaging Exam Certification Details:

Number of Questions40-60
Sample QuestionsMicrosoft 365 Messaging Sample Questions
Exam CodeMS-203
Schedule ExamPearson VUE
Duration120 mins
Exam Price$165 (USD)
Exam NameMicrosoft 365 Certified - Messaging Administrator Associate
Books / TrainingCourse MS-203T00-A: Microsoft 365 Messaging
Passing Score700 / 1000

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

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Planning & Implementing Hybrid Migration and Configuration: 20-25%

  • Manage Public Folders: the learners should also be able to demonstrate competence in creating public folder mailboxes, implementing public folder TLJ as well as mail-enabled public folders; planning and configuring public folders; planning public folder migrations to Microsoft 365.
  • Plan & Implement Migration: this subject area requires one’s skills in evaluating migration methods; configuring migration endpoints within Microsoft 365; managing request batches in mailbox migration; troubleshooting mailbox migration.

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Skills Tested in MS-203

Broadly speaking, such an exam tests your proficiency at deploying, configuring, managing, and monitoring messaging infrastructure, permissions, client access, mail protection, and mail flow in on-premises, cloud enterprise, hybrid, and environments. In line with the exams objectives, your skills will be tested in these four categories:

  • Manage Organizational Settings and Resources (30-35%);
  • Secure the Messaging Environment (20-25%).
  • Plan and Implement a Hybrid Configuration and Migration (20-25%);
  • Plan and Manage the Mail Architecture (20-25%);

What is the duration, language, and format of MS-203: Microsoft 365 Messaging

  • Number of Questions: 100 to 120 questions (Since Microsoft does not publish this information, the number of exam questions may change without notice)
  • Length of Examination: 50 mins
  • Passing Score: 70%
  • Languages in which this exam is available in: English, Japanese, Chinese (Simplified), Korean, German, French, Spanish
  • Type of Questions: This test format is multiple choice

Microsoft MS-203 Exam Syllabus Topics:

SectionWeightObjectives
Secure the messaging environment25–30%- Implement threat protection
  • 1. Configure anti-malware and anti-spam policies
  • 2. Manage Microsoft Defender for Office 365
  • 3. Set up quarantine policies
- Manage permissions and security
  • 1. Manage audit logging and reporting
  • 2. Configure RBAC and admin roles
  • 3. Implement data governance
- Manage compliance
  • 1. Configure data loss prevention (DLP)
  • 2. Implement retention and journal rules
  • 3. Manage eDiscovery and content search
Plan and manage mail transport architecture25–30%- Plan and configure connectors
  • 1. Create and manage inbound/outbound connectors
  • 2. Configure cross-tenant connectors
  • 3. Implement enhanced filtering
- Manage mail flow
  • 1. Configure hybrid mail flow
  • 2. Create and manage transport rules
  • 3. Implement email authentication: SPF, DKIM, DMARC
- Troubleshoot mail flow
  • 1. Interpret NDRs and transport logs
  • 2. Use connectivity analyzers
  • 3. Perform message trace and analyze headers
Manage Microsoft Exchange Online settings and resources40–45%- Manage recipients and resources
  • 1. Create and manage mailboxes, groups, and contacts
  • 2. Implement archive mailboxes and retention policies
  • 3. Manage resource mailboxes and permissions
  • 4. Manage email addresses and forwarding
- Plan and manage client access
  • 1. Manage Outlook on the web and mobile device policies
  • 2. Troubleshoot client connectivity
  • 3. Manage certificates and authentication
  • 4. Configure Autodiscover and virtual directories
- Manage organizational settings
  • 1. Manage address lists and address book policies
  • 2. Configure organizational sharing and relationships
  • 3. Configure email address policies
  • 4. Manage accepted and remote domains

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