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Securing the Messaging Environment

This domain is focused on the management of role-based permissions, ensuring message hygiene using office 365 advanced threat and exchange online, and compliance. To get ready for the questions under this section, one should gain enough knowledge about the following: the administration of role groups and user roles, planning of RBAC roles, connection filters, performing monitoring of the quarantined items, and ensuring protection for phishing. Along with this, candidates should be skilled in configuring ATP safe links, safe attachments, audit logs, etc.

The Skills Validated by MS-203

Passing the Microsoft MS-203 exam will confirm one's ability to complete a series of complex tasks related to the Microsoft 365 messaging platform. It emphasizes 4 major technical skill areas as covered below:

Managing organizational resources and settings

This topic checks if the candidate is able to plan as well as manage organizational settings. It also validates one's skills in planning and operating client access, managing recipient resources, and mobile devices. Speaking in detail, the knowledge areas one should grasp include add-ins administration, email address policies, virtual directories configuration, resolving connectivity issues, archive mailboxes management, including the management of permissions, configuring ActiveSync, etc.

Troubleshooting of mail flow

  • Validation of incoming and outgoing mail flow
  • Check-in mail flows
  • Researching tracing of messages
  • Message header analysis
  • Use Microsoft Remote Connectivity Analyzer for troubleshooting
  • Tracing messages
  • Investigation of transport logs
  • Non-Deliverable Reports (NDRs) analysis
  • Use Microsoft Support and Recovery Assistant for troubleshooting

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

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:

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

Microsoft MS-203 Exam Syllabus Topics:

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

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