MS-203 Exam Study Guide (Microsoft 365 Messaging)

MS-203 Microsoft 365 Messaging Study Guide

MS-203 Preparation Details

Preparing for the MS-203 Microsoft 365 Messaging exam to achieve the Microsoft 365 Certification for Messaging Administrator Administrator Associate? Don’t know where to start? This post is the MS-203 Certificate Study Guide (with links to each exam objective).

I have curated a list of articles from Microsoft documentation for each objective of the MS-203 exam. Please share the post within your circles so it helps them to prepare for the exam.

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Manage Organizational Settings and Resources (30-35%)

Plan and Manage Organizational Settings

Manage Global Address List (GAL)

Create a global address list in Exchange Online

Address lists in Exchange Server

Manage Offline Address Book (OAB)

Offline address books in Exchange Online

Change the default offline address book

Manage address book policies

Address book policies in Exchange Online

Change the settings of an address book policy

Manage email address policies

Email address policies

Configure organizational sharing

Organization relationships in Exchange Online

Create an organizational relationship

Manage add-ins

Add-ins for Outlook in Exchange Online

Third-party add-ins for online meetings in Outlook

Plan and Manage Client Access

Plan namespaces

Namespace planning in Exchange

Configure virtual directories and URLs

Configure Outlook on the web virtual directories

Configure external URLs

Configure internal URLs

Configure global Outlook on the Web policies

Configure Outlook on the web mailbox policy properties

Configure Autodiscover

Autodiscover service in Exchange Server

Troubleshoot client access connectivity problems

Outlook connection issues with Exchange mailboxes

Troubleshooting client connectivity

Manage Exchange certificates lifecycle

Digital certificates in Exchange Server

Add and manage DomainKeys Identified Mail (DKIM) signatures to domains

Use DKIM to validate outbound emails

Manage Recipient Resources

Manage archive mailboxes

Managing archive mailboxes

Manage in-place archives

Manage resource mailboxes

Managing resource mailboxes

Manage groups (distribution list, dynamic distribution list, mail-enabled security group, and Microsoft 365 group) by using the Classic or New Exchange admin center

Create and manage distribution groups in Exchange Online

Create distribution groups in the Microsoft 365 admin center

Manage dynamic distribution groups

Manage mail-enabled security groups

Manage guest access to Microsoft 365 groups

Manage mailboxes

Manage user mailboxes

Manage mailbox permissions

Manage permissions for recipients

Give mailbox permissions to another user

Configure mailbox policies

Configure web mailbox policy properties

Manage shared mailboxes

Create a shared mailbox

Shared mailboxes in Exchange Online

Evaluate license options

Exchange license types

Create and manage contacts (Mail contact and Mail user)

Manage mail contacts in Exchange Online

Manage mail users in Exchange Online

Manage Mobile Devices

Configure mobile device mailbox policies

Mobile device mailbox policies in Exchange

Configure mobile authentication methods

Account setup with modern authentication

Configure and manage Outlook mobile

Managing Outlook for iOS and Android

Manage mobile device access

Manage access to Exchange Online from iOS & Android

Configure and manage ActiveSync

Support more mobile devices by using Exchange ActiveSync

Plan and Manage the Mail Architecture (20-25%)

Plan and Configure Transport Architecture

Plan connectors


Configure mail flow using connectors

Create and configure connectors

Set up connectors between Microsoft 365 & your email servers

Configure connectors between tenants

Microsoft 365 inter-tenant collaboration

Configure enhanced filtering for connectors

Enhanced Filtering for Connectors

Manage Mail Flow

Manage transport rules

Mail flow rules (transport rules)

Manage mail flow rules in Exchange Online

Manage accepted and remote domains

Manage accepted domains

Manage remote domains

Manage hybrid mail flow

Manage mail flow between Exchange Online & on-premises

Troubleshoot Mail Flow

Validate inbound and outbound mail flow

Troubleshoot mail flow

Validate connectors

Trace a message by using the Classic or New Exchange admin center

Run a message trace in the classic EAC

Message trace in the modern Exchange admin center

Analyze a message trace

View message trace results

Analyze message headers

Exchange Header Analysis

How to read email message headers?

Anti-spam message headers in Microsoft 365

Analyze Non-Deliverable Reports (NDRs)

Email non-delivery reports in Exchange

Non-delivery report in the new Exchange admin center

Investigate transport logs

Transport logs in Exchange

Monitor Mail Flow

View mail flow reports in the Reports dashboard

Troubleshoot by using the Microsoft Remote Connectivity Analyzer

Use Remote Connectivity Analyzer to troubleshoot single sign-on issues

Troubleshoot by using the Microsoft Support and Recovery Assistant

Scan Outlook by using the Microsoft Support & Recovery Assistant

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Plan and Implement a Hybrid Configuration and Migration (20-25%)

Plan and Implement a Hybrid Environment

Evaluate and configure hybrid free/busy access

Demystifying Hybrid Free/Busy: what are the moving parts?

Shared free/busy in Exchange hybrid deployments

Decide between Exchange Classic Hybrid and Exchange Modern Hybrid

Exchange Classic Hybrid vs. Exchange Modern Hybrid

Manage the Edge server role

Edge Transport servers with hybrid deployments

Configure Organization Configuration Transfer (OCT)

Hybrid Organization Configuration Transfer

Plan and configure the environment by using the Hybrid Configuration Wizard (HCW)

Hybrid Configuration wizard

Deploy the Exchange Hybrid Agent

Microsoft Hybrid Agent

Plan and Implement Migration

Evaluate migration methods, including cutover, staged, PST Imports, IMAP, Google Workspace (formerly G-Suite), batch migration by using the Exchange admin center

Microsoft 365 email migration performance

Configure migration endpoints in Microsoft 365, including tenant-to-tenant

Move mailboxes between on-premises & Exchange Online

Configure migration endpoints

Cross-tenant mailbox migration

Manage mailbox migration request batches by using the Classic or New Exchange admin center

Manage migration batches

Manage mailbox migration

Migrating from non-Microsoft messaging systems

Migrate from other messaging systems

Troubleshoot mailbox migration

Troubleshoot migration issues in Exchange hybrid environment

Manage Public Folders

Move content between public folder mailboxes

Migrating public folders to Microsoft 365

Move a public folder to a different public folder mailbox

Create additional public folder mailboxes

Create a public folder mailbox

Implement public folder Top Level Hierarchy (TLH)

Implementing a public folder Top-Level Hierarchy (TLH)

Public folder hierarchy

Implement mail-enabled public folders

Mail-enable a public folder

Plan and configure public folders

Configure public folders for a hybrid deployment

Manage hold and discovery for public folders

Search and place a hold on public folders

Plan a public folder migration to Microsoft 365

Migrate legacy public folders to Microsoft 365

Secure the Messaging Environment (20-25%)

Manage Role-based Permissions

Manage role groups

Manage role groups in Exchange Online

Assign user accounts to admin roles

About the Exchange Online admin role

Manage user roles

Permissions in Exchange Online

Manage a delegated Role-based Access Control (RBAC) setup

Delegated setup

Plan RBAC roles for eDiscovery

Assign eDiscovery permissions

RBAC roles for eDiscovery

Manage Message Hygiene Using Exchange Online and Microsoft Defender for Office 365

Plan for message hygiene

Manage message hygiene using Exchange Online

Configure and manage Anti-spam settings

Antispam protection in Exchange

Anti-spam protection in EOP

Configure and manage Anti-malware policies

Anti-malware protection in EOP

Configure anti-malware policies in EOP

Anti-malware protection in Exchange Online Protection

Monitor and review quarantined items

Quarantined email messages

Manage quarantined messages and files

Plan and configure Spam Confidence Levels (SCL)

Spam confidence level (SCL) in EOP

Exchange spam confidence level (SCL) thresholds

Configure and manage safe attachments

Set up Safe Attachments policies for Office 365

Manage safe attachments

Configure and manage safe links

Set up Safe Links policies for Office 365

Manage Safe Links

Safe Links in Microsoft Defender for Office 365

Configure and manage anti-phishing

Anti-phishing policies in Microsoft 365

Configure anti-phishing policies for Office 365

Manage spam and malicious email user submissions

User submissions policy

Submit suspected spam, phish, & URLs

Manage Compliance

Configure Exchange retention and retention policies

Create a retention policy

Create a retention policy in Exchange Server

Apply a retention policy to mailboxes in Exchange Server

Configure Exchange data loss prevention policies

Data loss prevention in Exchange

Data loss prevention in Exchange Server

Configure Office 365 Labels, Retention, and DLP policies

Create and configure sensitivity labels

Create and configure retention policies

Create, test, and tune a DLP policy

Configure and analyze audit logs

Manage mailbox auditing

Manage journal rules

Manage journaling

Manage content search

Content search

Manage eDiscovery cases

Get started with Core eDiscovery

Manage an Advanced eDiscovery case

This brings us to the end of the MS-203 Microsoft 365 Messaging Study Guide.

What do you think? Let me know in the comments section if I have missed out on anything. Also, I love to hear from you how your MS-203 certification preparation is going on!

In case you are preparing for other Microsoft 365 certification exams, check out the Microsoft 365 study guide for those exams.

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