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Microsoft AB-900 Study Guide

Microsoft 365 Certified: Copilot and Agent Administration Fundamentals AB-900

Microsoft 365 Certified: Copilot and Agent Administration Fundamentals (AB-900) covers how to support, secure and protect an AI-enabled Microsoft 365 environment. It covers the core Microsoft 365 services and security features, data protection and governance with Microsoft Purview, and basic administration of Microsoft 365 Copilot and agents. It suits new administrators, IT staff and business users who manage Copilot.

  • Exam code AB-900
  • Fundamentals level
  • 3 exam domains

This guide is free, with no sign-up. It explains every Microsoft AB-900 exam topic in plain English, one chapter at a time. Read them in order or jump straight to the topic you need.

  • 3chapters
  • 17topics
  • 5diagrams and exhibits
  • 1 h 20 minfast track
Start with Core Features and Objects of Microsoft 365 Services
  • Every topic follows the same simple pattern: what it is, how it works, common mistakes
  • Diagrams and real command output where a picture explains it best
  • Exam tips and worked subnetting and IPv6 practice, with answers

How the exam is weighted

Each domain is worth roughly this share of the exam. The exam provider publishes a range for each domain, so the bar marks the middle of it. Spend your study time in proportion, and select a domain to open its chapter.

Chapters

Open a chapter to see its topics and how long each takes.

1Core Features and Objects of Microsoft 365 Services6 topics · 29 min fast trackLicenses, admin centers, Zero Trust, Entra ID, Conditional Access, Defender XDR and PIM.
  1. 1Licenses and the Microsoft 365 Admin Center5 min
  2. 2Exchange and Teams Admin Centers5 min
  3. 3SharePoint Admin Center, Sites and Permissions4 min
  4. 4Zero Trust, Authentication and Defender XDR5 min
  5. 5Entra ID, Conditional Access and SSO5 min
  6. 6Troubleshooting, Secure Score, Audit and PIM5 min
Read the chapter overview →
2Data Protection and Governance for Microsoft 365 and Copilot6 topics · 27 min fast trackPurview solutions, how Copilot uses data, risk tools and fixing oversharing in SharePoint.
  1. 1Purview Solutions at a Glance4 min
  2. 2Sensitivity Labels, Classification and Retention4 min
  3. 3How Copilot Accesses and Protects Data5 min
  4. 4Compliance Manager, Explorers and Content Search4 min
  5. 5Insider Risk, DLP Alerts, Communication Compliance and DSPM for AI5 min
  6. 6Oversharing and SharePoint Advanced Management5 min
Read the chapter overview →
3Basic Administrative Tasks for Copilot and Agents5 topics · 24 min fast trackLicenses, pay as you go billing, usage reports, prompts, agent approval and monitoring.
  1. 1Built In Capabilities and Licensing Models5 min
  2. 2Researcher, Analyst and Custom Agents4 min
  3. 3Assigning Licenses and Billing Policies5 min
  4. 4Usage, Adoption and Prompts5 min
  5. 5Managing Agents5 min
Read the chapter overview →

Ready for more practice?

The full Microsoft AB-900 question bank has 499 questions, with timed practice exams and an explanation for every answer.

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This study guide is independent and is not affiliated with, endorsed by, or sponsored by Microsoft. Vendor names, certification names and exam codes are trademarks of their respective owners and are used for identification only.