Microsoft 365 Certified: Copilot and Agent Administration Fundamentals credential artwork

Microsoft 365 Certified: Copilot and Agent Administration Fundamentals (AB-900) Practice Tests

Validates foundational knowledge of Microsoft 365 services, data protection and governance, and basic administration of Copilot and agents.

AB-900 runs 45 minutes, and Microsoft says most of its exams have 40 to 60 questions. It is a short scenario exam on Microsoft 365 admin centers, Purview and Copilot administration, so practice has to drill those admin tasks. We compared the main options on official coverage, explanations and price.

Most people should start with Microsoft's free practice assessment and the 20-question Tutorials Dojo sampler. Then add a full explained set from Tutorials Dojo or MeasureUp to drill Purview and Copilot admin tasks before you book.

Practice testBest forQuestionsPrice
AB-900 Practice Exams SamplerFree quick sample20Free
AB-900 Microsoft 365 Copilot and Agent Administration Fundamentals Practice ExamsExplained practice sets100+$13
Microsoft Practice Test AB-900: Microsoft 365 Copilot and Agent Administration FundamentalsOfficial timed practice115$99
Free official check

AB-900 Practice Assessment

Microsoft's own practice questions, linked from the certification page. The score report gives the answer, a rationale and reading links for every question, and you can retake it as often as you like.

Great fit if you want the closest thing to Microsoft's own wording before paying for anything.

Poor fit if you need several fresh full-length sets; add Tutorials Dojo or MeasureUp.

Free quick sample

AB-900 Practice Exams Sampler

Twenty free scenario questions in timed or review mode, each with a rationale, plus bonus flashcards. A preview of the paid Tutorials Dojo set.

Great fit if you want a second free check on Purview, core services and Copilot admin questions.

Poor fit if you need more than one short session; the full Tutorials Dojo set is next.

Explained practice sets

AB-900 Microsoft 365 Copilot and Agent Administration Fundamentals Practice Exams

A 100+ question bank in randomized, timed, review and section-based modes. Questions include multiple-answer, dropdown and hotspot formats, with explanations that link to Microsoft documentation.

Great fit if you want a cheap, explained question bank for Purview and Copilot admin scenarios.

Poor fit if you want Microsoft's official partner bank; MeasureUp is next.

Official timed practice

Microsoft Practice Test AB-900: Microsoft 365 Copilot and Agent Administration Fundamentals

Microsoft's official practice-test partner, released April 2026. Certification mode is timed and hides answers until the end; practice mode sets your own length and topics, with explanations and references.

Great fit if you want an official timed run in exam conditions and can afford the price.

Poor fit if you are buying one budget set; Tutorials Dojo costs a fraction of this.

What to look for in a AB-900 practice test

  • Match the October 2026 outline. The skills measured were last changed on 14 October 2026 with a minor edit to the Microsoft 365 security area. Any set written for the retired MS-900 will miss Copilot, agents and Purview, which together are most of the exam.
  • Look for Purview and admin-center depth. The data protection and governance area carries 35 to 40 percent. Candidates who passed describe an exam heavy on Purview, SharePoint and Copilot, with few questions on classic Microsoft 365 features.
  • Prefer scenario questions with full explanations. Questions ask which admin center, setting or Purview feature fits a situation. Tutorials Dojo and MeasureUp explain each answer and link to Microsoft documentation, which is how you learn the admin centers.
  • Expect fresh volume to be limited. Tutorials Dojo has 100+ questions and MeasureUp 115, so combining the free Microsoft assessment with one paid set is enough for most candidates. Udemy sets from small publishers vary, so read recent reviews first.
  • Skip sites selling "real exam questions." Sites promising actual AB-900 questions or a guaranteed pass are selling leaked or copied items. Microsoft's exam policies count brain dumps as cheating and let Microsoft revoke your certifications and bar you from future exams. A real practice test explains why each answer is right; a dump only lists answers.

How to use AB-900 practice tests

  • Take the Microsoft assessment first. Use it as a diagnostic and note which of the three areas you miss: core services and security, Purview data protection, or Copilot and agent administration.
  • Read the explanation for every miss and every guess. A guessed right answer is still a gap. For each miss, write why the correct feature fits and why the other options belong to a different tool.
  • Practise in the admin centers, not just on questions. Candidates say Microsoft Learn alone left gaps and that you need to be comfortable in the Microsoft 365, SharePoint, Purview and Teams admin centers. Click through them in a trial tenant.
  • Run a timed set late, then stop. Do one full timed set in the last week to check pacing against the 45-minute exam, then fix weak areas rather than retaking the same questions.

Microsoft: AB-900 study guide ↗Reddit: best AB-900 practice tests ↗Reddit: AB-900 exam review (beta) ↗Reddit: passed AB-900 (805) ↗Reddit: AB-900 official practice exams ↗

AB-900 practice test FAQ

Is there a free AB-900 practice test?

Yes. Microsoft offers a free practice assessment on the AB-900 certification page, Tutorials Dojo has a free 20-question sampler, and Whizlabs lists a free 15-question test on its AB-900 page.

Is the Microsoft Learn material enough to pass AB-900?

Reports are mixed. Some passers did well on Learn plus a video course, while others say Learn alone was not enough and that hands-on time in the admin centers mattered. A third-party set helps most with Purview questions.

Does MeasureUp have an AB-900 practice test?

Yes. It has 115 questions at $99 list, released April 2026, with timed certification and customizable practice modes and explanations for every answer.

How hard is AB-900 compared with other fundamentals exams?

Candidates call it easy to moderate for a fundamentals exam but heavy on Purview and SharePoint governance. The questions are short scenarios, so understanding which tool does what matters more than memorising lists.