AB-900 is the NEW Microsoft fundamentals certification that REPLACED the retired MS-900 on March 31, 2026. It is NOT a re-skin: Microsoft dropped the "cloud concepts" and "pricing/licensing/lifecycle" domains and added two brand-new ones focused on Microsoft 365 Copilot & agent administration and Microsoft Purview data protection & governance.

If you studied for MS-900, almost none of your notes cover the AB-900 skills measured. This practice test course fills that gap with 600 fresh, exam-realistic questions that reflect the new skills measured as of October 14, 2026.

WHAT YOU GET

• 6 full-length practice sets, 100 questions each, for a total of 600 questions

• Set 1: Diagnostic Readiness Check across all 3 domains (32/37/28 weighting)

• Set 2: Domain 1 deep dive — Microsoft 365 core features, admin centers, Microsoft Entra ID, Defender XDR, Zero Trust

• Set 3: Domain 2 deep dive — Microsoft Purview (sensitivity labels, DLP, Insider Risk, Communication Compliance, DSPM for AI, Data Lifecycle), Copilot data security

• Set 4: Domain 3 deep dive — Microsoft 365 Copilot licensing (per-user vs pay-as-you-go), Copilot Analytics, custom agents, agent approval workflow

• Set 5: Full-length exam simulation at the real 32/37/28 weighting

• Set 6: Final review + tricky edge cases for last-mile prep

WHY THESE QUESTIONS ARE DIFFERENT

• Every distractor is a real Microsoft 365 / Purview / Defender / Copilot component — no "all of the above" filler, no imaginary features

• Per-option inline explanations — every distractor has a one-sentence explanation of why it's wrong, not just a paragraph after the question

• Comprehensive Overall Explanation on every question, with a direct link to the Microsoft Learn reference URL

• Mapped 1:1 to the official AB-900 skills measured, with the exact domain strings from the study guide

• Multi-select questions ("Choose all that apply") included at the same proportion as the real exam

• Delivered in the Udemy v2 Bulk Question Upload CSV format — drop the file straight into Udemy's importer, no manual editing

RECOMMENDED STUDY SCHEDULE

Day 1 — Set 1 (Diagnostic baseline)

Day 2 — Set 2 (Domain 1 deep dive)

Day 3 — Set 3 (Domain 2 deep dive)

Day 4 — Set 4 (Domain 3 deep dive)

Day 5 — Set 5 (Timed exam simulation, 45 minutes)

Day 6 — Set 6 (Edge cases + final review)

Day 7 — Light review of incorrect answers, then sit the real exam

This course covers the AB-900 exam skills measured as published on October 14, 2026. The official study guide is the single source of truth.