Microsoft 365 Certified: Copilot and Agent Administration Fundamentals (AB-900): exam guide, passing score and how to prepare
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What the Microsoft AB-900 exam covers, what to check before you book, the ideas people mix up, and a simple way to prepare. Last updated .
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Before exam day: what to know about Microsoft AB-900
The real exam is run by the provider. These are the details people look for before they book.
Source: the provider’s official page, checked on 1 November 2026. The provider can change these details at any time.
Your exam-day checklist
- Confirm the details above on the provider’s page the day you book. Formats and rules change.
- Match your name and ID. The name on your registration usually has to match your identification. Check the provider’s ID rules.
- Test your set-up early if you take the exam online: camera, microphone, internet and a clear desk. Providers publish a system test.
- Know the rules for breaks and materials before you sit. Read the candidate agreement.
- Rehearse at exam pace. Take your last practice test with a timer and no notes.
What the Microsoft AB-900 exam covers
The Microsoft 365 Certified: Copilot and Agent Administration Fundamentals (AB-900) exam is about administering Microsoft 365 Copilot and agents. Always check the provider’s official exam guide for the current objectives, fees and format.
Roles this can lead to
- Microsoft 365 administrator
- IT support and service desk lead
- Modern workplace specialist
- Copilot rollout coordinator
Easy to mix up on the Microsoft AB-900 exam
Exam questions often use two ideas that sound alike. Learn the difference once and several questions become easy.
| Pair | The key difference | How to choose |
|---|---|---|
| Sensitivity labels or Data loss prevention (DLP) policies | Sensitivity labels classify and protect content, for example with encryption, whereas DLP policies detect and block risky sharing of sensitive information. | Apply a label to mark and protect a document; create a DLP policy to stop sensitive data being sent out. |
| Microsoft 365 Copilot or Microsoft 365 Copilot Chat | Copilot Chat is a web-grounded AI chat experience, while Microsoft 365 Copilot adds grounding in your organisation's work data and integration in Microsoft 365 apps. | Choose Copilot Chat for general web-grounded assistance; choose a Copilot licence when answers must use work data in the apps. |
| Authentication or Authorisation | Authentication proves who a user is, whereas authorisation decides what that user is allowed to access. | Use MFA to strengthen authentication; use roles and permissions to control authorisation. |
| Microsoft Entra or Microsoft Purview | Microsoft Entra manages identity and access, while Microsoft Purview handles data governance, protection and compliance. | Go to Entra for sign-in and Conditional Access; go to Purview for labels, retention and data protection. |
Study notes written by us. Always check the provider’s exam guide for the current objectives.
How to prepare in four steps
- Read the official exam guideNote the domains and their weights on the provider’s page.
- Take Test 1 as a baseline50 questions in 45 minutes, no notes.
- Fix the gapsRead every explanation and keep an error log.
- Repeat to 80%Two timed tests in a row, then book the exam.
See how we explain every option
Each option in our tests has a reason: why the right answer is right and what trap each wrong option sets.
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After Microsoft 365 Copilot is enabled, an employee asks it for a summary and the answer draws on a confidential SharePoint document the employee was never meant to see. What is the most likely underlying cause?
Illustration from the AI topic area. An original question written for this exam’s topics, not an actual exam question.
Frequently asked questions
What is the Microsoft AB-900 exam?
The Microsoft 365 Certified: Copilot and Agent Administration Fundamentals (AB-900) exam is about administering Microsoft 365 Copilot and agents. We rate it fundamentals level in our guide to help you choose.
How long is the Microsoft AB-900 exam?
45 minutes. Source: the provider, checked 1 November 2026.
Who should take Microsoft AB-900?
It suits people in or moving toward roles such as Microsoft 365 administrator, IT support and service desk lead, Modern workplace specialist. A certificate supports an application but does not guarantee a job.
How should I prepare for Microsoft AB-900?
Read the provider's official exam guide, take one timed practice test as a baseline, fix the topics you missed, then repeat until you reach about 80 percent twice in a row. Our Microsoft AB-900 study plan shows the pace.
Not affiliated with, endorsed by or sponsored by any certification vendor or exam body. Certification names, exam codes and product names are trademarks of their respective owners and are used only to identify the exam a practice product prepares for. Our questions are original and are not actual exam questions.