Microsoft Certified: Messaging Administrator Associate (Intermediate)

Validate your technical skills and grow your career.

This certification demonstrates that the recipient is proficient in managing organization settings and
resources, planning and management of the mail architecture, planning and implementation of a
hybrid configuration and migration – all while securing the messaging environment.

Why Take The Microsoft Certified: Messaging Administrator Associate (Intermediate) MS-203 Exam?

The need AI tech professionals is going to increase dramatically in the near future and passing the
exam will help you secure an excellent position in the industry.

Increase My Salary:

  • The average salary for someone who holds a Microsoft Certified: Messaging Administrator
    Associate (Intermediate) certification is around $98,000 / year.

Be Part Of The Team:

  • Manage the messaging infrastructure for your organization, plan and manage the mail
    architecture while providing a secure messaging environment.

Abilities Validated By The Certification:

  • Manage organizational settings and resources
  • Plan and manage the mail architecture
  • Plan and implement a hybrid configuration and migration
  • Secure the messaging environment

Recommended Knowledge & Experience:

  • While it’s not required, it is recommended that the candidate already has their Microsoft
    365 Fundamentals Certification before taking the exam.

Exam Topics & Scoring:

Exam MS-203: Microsoft 365 Messaging


Plan and manage organizational settings

  • manage Global Address List (GAL)
  • manage Offline Address Book (OAB)
  • manage address book policies
  • manage email address policies
  • configure organizational sharing
  • manage add-ins

Plan and manage client access

  • plan namespaces
  • configure virtual directories and URLs
  • configure global Outlook Web App (OWA) policies
  • configure Autodiscover
  • troubleshoot client access connectivity problems
  • manage Exchange certificates lifecycle

Manage recipient resources

  • manage archive mailboxes
  • manage resource mailboxes
  • manage groups (Distribution, Security, and Office 365)
  • manage mailboxes
  • manage mailbox permissions
  • configure mailbox policies
  • manage shared mailboxes
  • evaluate license options
  • manage mail users

Manage mobile devices

  • configure mobile device mailbox policies
  • configure mobile authentication methods
  • configure and manage Outlook mobile
  • manage mobile device access
  • configure and manage ActiveSync



Plan and configure transport architecture

  • plan connectors
  • create and configure connectors
  • configure connectors between tenants

Manage mail flow

  • manage transport rules
  • manage domains
  • manage hybrid mail flow

Troubleshoot mail flow

  • validate inbound and outbound mail flow
  • trace a message
  • analyze a message trace
  • analyze message headers
  • analyze Non-Deliverable Reports (NDRs)
  • investigate transport logs
  • monitor Mail Flow



Plan and implement a hybrid environment

  • evaluate and configure hybrid free/busy access (NOT: ADFS, WAP and Not Azure AD Connect, IdFix because they belong to the Modern Desktop Admin)
  • decide between Exchange Classic Hybrid and Exchange Modern Hybrid
  • manage the Edge server role
  • configure Organization Configuration Transfer (OCT)
  • plan and configure the environment by using the Hybrid Configuration Wizard (HCW)
  • deploy the Exchange Hybrid Agent

Plan and implement migration

  • evaluate migration methods, including cutover, staged, PST Imports, IMAP, G-Suite
  • configure migration endpoints in Microsoft 365, including tenant-to-tenant
  • manage mailbox migration request batches
  • migrating from non-Microsoft messaging systems (NOT: not on-prem solutions)
  • troubleshoot mailbox migration

Manage public folders

  • move content between public folder mailboxes
  • create additional public folder mailboxes
  • implement public folder Top Level Hierarchy (TLH)
  • implement mail-enabled public folders
  • plan and configure public folders
  • manage hold and discovery for public folders
  • plan a public folder migration to Microsoft 365



Manage role-based permissions

  • manage role groups
  • assign user accounts to admin roles
  • manage user roles
  • manage a delegated Role-based Access Control (RBAC) setup
  • plan RBAC roles for eDiscovery

Manage message hygiene using Exchange Online and Office 365 Advanced Threat Protection (ATP)

  • plan for message hygiene
  • manage connection filters
  • configure malware filters
  • configure spam filters
  • monitor quarantined items
  • manage protection for phishing
  • plan and configure Spam Confidence Levels (SCL)
  • configure and manage ATP safe attachments
  • configure and manage ATP safe links
  • configure and manage ATP anti-phishing

Manage compliance

  • configure retention policies
  • configure data loss prevention policies
  • configure and analyze audit logs
  • manage journal rules
  • manage content search
  • manage litigation, in-place, and retention holds


Prepare for your exam:

The best way to prepare is with first-hand experience. Taking advantage of the opportunities that
Phoenix TS provides will assist you with gathering all the knowledge and skills you’ll need for

Phoenix TS Microsoft Certified: Messaging Administrator Associate (Intermediate) – Learning Pathways


  • MS-203T00: Microsoft 365 Messaging

    Course Overview Phoenix TS’ 5-day instructor-led Microsoft 365 Messaging training and certification boot camp in Washington, DC Metro, Tysons Corner, VA, Columbia, MD or Live Online examines the key elements of Microsoft 365 messaging administration, including message transport and mail flow, messaging security, hygiene, and compliance, messaging infrastructure, and hybrid messaging. This course is designed […]

    Click To Read More



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