AB-400 replaces PL-400 on 16 October 2026

Key dates

• 16 October 2026: PL-400 registration closes and AB-400 registration opens
• 30 October 2026: Last day to take PL-400 for learners who registered on or before 16 October

What changed

• Microsoft states that the updated AB-400 exam is available from 16 October 2026.

Skills AB-400 assesses, as listed by Microsoft

• Build Microsoft Power Platform solutions: 15 to 20%
• Extend the user experience: 25 to 30%
• Extend Microsoft Power Platform: 35 to 40%
• Develop integrations: 10 to 15%

What to re-study

Microsoft's AB-400 exam page lists these among the skills and experience expected of a candidate. If your PL-400 study did not cover them, add them.

• Agentic AI as part of your solution logic
• AI assisted tools and agents to enhance solution development and troubleshooting
• Microsoft Foundry
• Microsoft Copilot Studio

Source

Microsoft states these dates and skills on Exam AB-400: Power Platform Developer Associate, Microsoft Learn (retrieved 9 October 2026). Quoted text: October 16, 2026: Registration for PL-400 closes, and registration opens exclusively for AB-400. Learners who register for PL-400 on or before October 16 can continue to schedule and take the exam through October 30, 2026. The updated AB-400 exam will be available beginning October 16, 2026

Practise for this change

• AB-400 practice questions
• PL-400 practice questions