AB-900 practice test
Microsoft Copilot and Agent Administration Fundamentals
100 practice questions, spread across the exam's topics the same way Microsoft weights them, each with a full explanation and a link to the official documentation that proves the answer. Written by a Microsoft Certified Trainer who does this work for a living.
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What is inside
Every area the exam tests
Our questions are spread the same way Microsoft weights the exam, so your practice matches the real thing.
Microsoft 365 services
30 to 35%Licence types and what they give users and groups, organisation settings and domains in the admin centre, mailboxes and distribution groups in Exchange, sites, libraries and permissions in SharePoint, teams, channels and policies in Teams, and the security features underneath: Zero Trust principles, authentication and authorisation, Defender XDR, Entra ID, conditional access, single sign-on, troubleshooting sign-ins, Identity Secure Score, audit logs, Privileged Identity Management, and the difference between app registrations and enterprise applications.
32 questionsData protection and governance
35 to 40%Purview information protection, data loss prevention, insider risk, communication compliance, data security posture management for AI and lifecycle management, sensitivity labels, classification and retention, how Copilot reaches data through Microsoft Graph and inherits a user's permissions, responsible AI principles, Compliance Manager, Data Explorer and Activity Explorer, content search in eDiscovery, and finding and fixing oversharing in SharePoint with access governance reports and restricted access control.
38 questionsCopilot and agent administration
25 to 30%What Copilot and agents each do, the monthly licence against pay as you go, which features can be turned on and off, use cases for Researcher, Analyst and custom agents, assigning licences, managing billing policies, monitoring usage and adoption through Copilot Analytics and the admin centre, managing prompts, giving users access to agents, creating an agent, the approval process, and monitoring agents through the Microsoft 365 and Power Platform admin centres.
30 questionsMicrosoft last updated this exam on 14 October 2026. Our questions match that version.
How you will use it
Practise the way that suits you
- Learn as you go. Answer, read why straight away, then move on. No clock, no pressure.
- Or sit it timed. A clock, no answers until the end, and two minutes a question, so you learn to pace yourself.
- Score by topic. See which area let you down instead of one number out of a hundred.
- Go back over it. Read every question again afterwards, right and wrong, with the full explanation.
Is it for you
Who takes AB-900
Administrators asked to turn Copilot on for an organisation
Licensing, enabling features, approvals and monitoring are a third of it.
Anybody responsible for what Copilot can reach
The largest area is Purview, permissions and oversharing in SharePoint.
People new to Microsoft 365 administration
A third of it is which admin centre owns which object, which is the foundation.
Also worth doing
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