Microsoft 365 (AB-900) Exam Questions 2026

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The AB-900 exam, officially titled Exam AB-900: Microsoft 365 Copilot and Agent Administration Fundamentals, is a foundational certification launched in early 2026. It serves as the modern successor to the MS-900 (Microsoft 365 Fundamentals).

While MS-900 focused on general cloud services, AB-900 is specifically designed for the “AI-first” workplace, emphasizing the administration, security, and governance of Microsoft Copilot and autonomous AI agents.

Exam Profile

• Target Audience: IT Professionals, Administrators, and Business Stakeholders responsible for deploying and managing AI productivity tools.

• Level: Fundamentals (Beginner). No prerequisites required.

• Passing Score: 700 / 1000.

• Format: 40–60 questions (Multiple choice, drag-and-drop, and drop-down selections)

Skills Measured (Domain Breakdown)

The exam evaluates your ability to maintain a secure and compliant AI environment within the Microsoft 365 ecosystem.

 Critical Concepts to Master

If you are preparing for the AB-900 in 2026, focus heavily on these three pillars:

1. The Semantic Index and Microsoft Graph

Understand how Copilot “sees” your data. The exam tests your knowledge of how Copilot uses Microsoft Graph to access emails, files, and chats while respecting existing permissions.

2. Governance with Microsoft Purview

A major part of the exam covers Data Security Posture Management (DSPM) for AI. You must know how to.

• Identify sensitive data being used by AI.

• Use Sensitivity Labels to restrict what Copilot can summarize.

• Monitor for “risky” AI interactions using Insider Risk Management.

3. Agent Administration

With the rise of agentic AI, you need to understand the administrative side of Copilot Studio:

• How to enable/disable specific agents for the tenant.

• The workflow for approving custom-built agents before they go live.

• Monitoring agent performance and cost (including pay-as-you-go billing).

Study Strategy

1. Transition from MS-900: If you have already studied for MS-900, about 25% of that knowledge (identity and cloud basics) applies here, but you will need to bridge the gap with the new AI-specific modules.

2. Microsoft Learn: Complete the “Copilot and Agent Administration” learning path on the Microsoft Learn portal.

3. Hands-on Admin Center: Spend time in the Microsoft 365 Admin Center under the “Settings > Search & intelligence > Configurations” section where Copilot settings live.

4. Pro Tip: Look for the Microsoft Credentials AI Challenge (usually held in early Q1). Microsoft often provides free or discounted vouchers for AB-900 upon completion of the associated learning path.

Know more about the exam here : https://learn.microsoft.com/en-us/credentials/certifications/copilot-and-agent-administration-fundamentals/?practice-assessment-type=certification