MS-220T00: Troubleshoot Microsoft Exchange Online Course Overview

MS-220T00: Troubleshoot Microsoft Exchange Online Course Overview

The MS-220T00: Troubleshoot Microsoft Exchange Online course is designed for IT professionals who manage and troubleshoot Exchange Online in an enterprise environment. Through this comprehensive Microsoft Exchange Online training, learners will acquire skills to effectively troubleshoot mail flow issues, compliance and retention problems, client connectivity, and authentication glitches, as well as understand the nuances of configuration and hybrid migration challenges. The course, structured in five modules, also highlights how to address concerns reported by Microsoft Defender for Office 365, ensuring a secure mail environment. By completing this course, participants can prepare for the Microsoft Exchange Online certification, demonstrating their expertise in maintaining and troubleshooting Exchange Online. This training is an invaluable resource for IT pros looking to ensure optimal performance and security for their organization's Exchange Online deployment.

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Course Prerequisites

To ensure that participants are well-prepared to get the most out of the MS-220T00: Troubleshoot Microsoft Exchange Online course, the following minimum prerequisites are recommended:


  • Basic understanding of Microsoft Exchange and the core functional components.
  • Familiarity with Microsoft 365 services and the general navigation within the Microsoft 365 admin center.
  • Experience with managing email systems and understanding how email routing works.
  • Basic knowledge of email protocols such as SMTP, IMAP, and POP.
  • Fundamental awareness of Active Directory concepts such as domains, users, and permissions.
  • Prior exposure to PowerShell, particularly in relation to managing Exchange Online and Microsoft 365.
  • Understanding of common email security concepts, including spam filtering, encryption, and malware protection.
  • Some experience with Exchange Online or other email services in a support or administration capacity is beneficial.

These prerequisites are intended to provide a foundation that will help learners to fully engage with the course content and successfully troubleshoot Microsoft Exchange Online.


Target Audience for MS-220T00: Troubleshoot Microsoft Exchange Online

The MS-220T00 course equips IT professionals with skills to troubleshoot Microsoft Exchange Online, focusing on mail flow, compliance, client issues, and more.


  • IT Support Specialists
  • Systems Administrators
  • Exchange Server Administrators
  • Microsoft 365 Administrators
  • Messaging Architects
  • IT Security Professionals
  • Network Administrators
  • Helpdesk Technicians who specialize in email support
  • Infrastructure Engineers with a focus on messaging
  • Technical Consultants handling Exchange environments
  • Cybersecurity Analysts with an interest in email security
  • Professionals responsible for hybrid Exchange environments
  • IT Professionals overseeing email migrations to the cloud


Learning Objectives - What you will Learn in this MS-220T00: Troubleshoot Microsoft Exchange Online?

Introduction to the Course's Learning Outcomes and Concepts Covered:

Gain expertise in resolving Microsoft Exchange Online challenges through the MS-220T00 course, focusing on mail flow, compliance, client issues, configuration, and hybrid/migration troubleshooting.

Learning Objectives and Outcomes:

  • Diagnose and resolve mail flow problems within Exchange Online and between external systems.
  • Apply troubleshooting techniques for issues related to Microsoft Defender for Office 365.
  • Address and correct compliance issues, including those involving data governance and eDiscovery.
  • Manage retention policies and investigate issues with retention tags and policies.
  • Troubleshoot Office Message Encryption (OME) and S/MIME for secure email communication.
  • Investigate and resolve mailbox auditing discrepancies to ensure proper monitoring.
  • Analyze and correct journaling issues that affect record-keeping and compliance.
  • Troubleshoot connectivity, authentication, calendaring, and calendar sharing issues in mail clients.
  • Resolve configuration problems, including recipient and organizational settings, provisioning, and public folder issues.
  • Tackle challenges in hybrid Exchange setups and email migration processes, ensuring seamless transitions.

Technical Topic Explanation

Mail flow issues

Mail flow issues in Microsoft Exchange or Exchange Online involve problems with sending or receiving emails. These issues can stem from server errors, configuration errors, network problems, or incorrect DNS settings. Troubleshooting Microsoft Exchange or Exchange Online troubleshooting often requires checking the mail server statuses, verifying network connectivity, analyzing error messages, and ensuring all settings are appropriately configured. Effective resolution ensures seamless communication and is essential for business operations. Microsoft Exchange Online training and certification, such as MS 220, can equip professionals with the skills to manage and resolve these issues efficiently.

Compliance and retention problems

Compliance and retention problems refer to the challenges organizations face in adhering to legal standards and regulations while maintaining records effectively. Compliance ensures that a business meets regulatory requirements which could pertain to data protection, financial accountability, or operational procedures. Retention involves the management and safekeeping of important information over time, necessitating robust systems for the cataloguing and preservation of data. Failure to manage compliance and retention adequately can lead to legal penalties, financial losses, and damaged reputations. Both require stringent checks and systematic handling within an organization's operations.

Client connectivity

Client connectivity refers to the process through which client devices (like computers or mobile devices) connect to servers to access services, such as emails in Microsoft Exchange. To ensure smooth connectivity, troubleshooting Microsoft Exchange is critical, particularly when issues arise. Exchange Online, the cloud-based version of Microsoft Exchange, offers tools and documentation specifically for Exchange Online troubleshooting. For professionals, enhancing skills through Microsoft Exchange Online training and aiming for Microsoft Exchange Online certification (like the MS-220) can significantly improve their ability to manage, maintain, and troubleshoot Exchange environments efficiently.

Authentication glitches

Authentication glitches occur when systems fail to verify user identities correctly, which can prevent users from accessing services or data securely. Common in systems like Microsoft Exchange, these issues may arise from incorrect login credentials, expired passwords, or faulty configuration settings. Troubleshooting often involves checking and resetting user permissions, updating software, or reconfiguring server settings. Proper training, such as Microsoft Exchange Online training or certification (e.g., MS 220), equips professionals with the skills to effectively address and prevent these glitches, ensuring reliable and secure user access in Exchange Online environments.

Hybrid migration challenges

Hybrid migration, involving a shift from Microsoft Exchange to Exchange Online, presents challenges like data synchronization difficulties, which can hinder seamless integration. Security concerns during data transfer can also pose risks. Troubleshooting Microsoft Exchange issues, like connectivity errors or data loss, becomes crucial in ensuring a smooth transition. Ensuring staff undergo Microsoft Exchange Online training and earn Microsoft Exchange Online certification can equip them with necessary skills for effective migration and troubleshooting. Addressing these challenges systematically is essential for maintaining organizational efficiency and data integrity during the migration process.

Microsoft Defender for Office 365

Microsoft Defender for Office 365 is a security tool designed to protect organizations from cyber threats in their communication and collaboration services. It safeguards against malware, phishing, and other attacks primarily targeting email and collaboration platforms like Teams and SharePoint. The service includes advanced threat detection, real-time defense mechanisms, and extensive investigation capabilities, ensuring both preventive protection and actionable insights for ongoing security management. This protection plays a crucial role especially as businesses increasingly rely on digital communication tools, enhancing overall security posture and safeguarding sensitive information.

Target Audience for MS-220T00: Troubleshoot Microsoft Exchange Online

The MS-220T00 course equips IT professionals with skills to troubleshoot Microsoft Exchange Online, focusing on mail flow, compliance, client issues, and more.


  • IT Support Specialists
  • Systems Administrators
  • Exchange Server Administrators
  • Microsoft 365 Administrators
  • Messaging Architects
  • IT Security Professionals
  • Network Administrators
  • Helpdesk Technicians who specialize in email support
  • Infrastructure Engineers with a focus on messaging
  • Technical Consultants handling Exchange environments
  • Cybersecurity Analysts with an interest in email security
  • Professionals responsible for hybrid Exchange environments
  • IT Professionals overseeing email migrations to the cloud


Learning Objectives - What you will Learn in this MS-220T00: Troubleshoot Microsoft Exchange Online?

Introduction to the Course's Learning Outcomes and Concepts Covered:

Gain expertise in resolving Microsoft Exchange Online challenges through the MS-220T00 course, focusing on mail flow, compliance, client issues, configuration, and hybrid/migration troubleshooting.

Learning Objectives and Outcomes:

  • Diagnose and resolve mail flow problems within Exchange Online and between external systems.
  • Apply troubleshooting techniques for issues related to Microsoft Defender for Office 365.
  • Address and correct compliance issues, including those involving data governance and eDiscovery.
  • Manage retention policies and investigate issues with retention tags and policies.
  • Troubleshoot Office Message Encryption (OME) and S/MIME for secure email communication.
  • Investigate and resolve mailbox auditing discrepancies to ensure proper monitoring.
  • Analyze and correct journaling issues that affect record-keeping and compliance.
  • Troubleshoot connectivity, authentication, calendaring, and calendar sharing issues in mail clients.
  • Resolve configuration problems, including recipient and organizational settings, provisioning, and public folder issues.
  • Tackle challenges in hybrid Exchange setups and email migration processes, ensuring seamless transitions.