Microsoft is transitioning the Microsoft Certified: Power Platform Developer Associate exam from PL-400 Microsoft Power Platform Developer to the new AB-400 Extending Microsoft Power Platform Solutions with Code and AI exam, effective October 16, 2026. To help you prepare well for success, the most valid AB-400 Exam Guide with Practice Test Questions from PassQuestion provides focused preparation around the updated exam skills, including Power Platform solution development, Dataverse extensibility, Power Apps component framework (PCF), custom connectors, integrations, application lifecycle management (ALM), Power Automate extensions, and AI-powered development capabilities. With scenario-based practice questions, candidates can better understand how to apply code and AI technologies to extend Microsoft Power Platform solutions in real-world business environments.

The AB-400 exam is a Microsoft associate-level certification exam titled Extending Microsoft Power Platform Solutions with Code and AI. Passing this exam earns the Microsoft Certified: Power Platform Developer Associate credential. The transition reflects Microsoft's continued evolution of Power Platform development by combining traditional application extensibility skills with modern AI capabilities.

Microsoft PL-400 to AB-400 Exam Transition

Microsoft is transitioning the Power Platform Developer Associate certification from PL-400 Microsoft Power Platform Developer to the new AB-400 Extending Microsoft Power Platform Solutions with Code and AI exam. This change reflects Microsoft's shift toward AI-enabled application development and the evolving responsibilities of Power Platform developers.

Date	Transition Event
October 16, 2026	PL-400 registration closes, and the new AB-400 exam becomes available for registration.
October 30, 2026	Final date to take the PL-400 exam for candidates who registered on or before October 16, 2026.
After October 16, 2026	New candidates prepare for and take the AB-400 Extending Microsoft Power Platform Solutions with Code and AI exam.

What Is the AB-400 Extending Microsoft Power Platform Solutions with Code and AI Exam?

The AB-400 exam validates the skills required to extend Microsoft Power Platform solutions by using professional development techniques and AI capabilities.

The exam focuses on the ability to:

• Build Power Platform solutions
• Extend applications with custom code
• Develop Dataverse-based components
• Create integrations
• Use APIs and Azure services
• Implement ALM practices
• Enhance solutions with AI capabilities

The certification is designed for developers who need to move beyond standard configuration and create scalable, enterprise-ready Power Platform applications.

The key skill model is:
Business Requirement → Power Platform Solution → Code Extension → AI Enhancement → Deployment

Who Should Take the AB-400 Exam?

The AB-400 exam is designed for professionals who develop and customize Microsoft Power Platform solutions.

Typical candidates include:

• Power Platform Developers
• Software Developers
• Application Developers
• Dynamics 365 Developers
• Technical Consultants
• Solution Architects
• Integration Developers

Candidates should have experience with:

• Dataverse
• Power Apps
• Power Automate
• JavaScript
• C#
• APIs
• Azure services
• Development lifecycle concepts

AB-400 Exam Skills Measured

The AB-400 exam focuses on four major skill areas:

Skill Area	Weight
Build Microsoft Power Platform Solutions	15–20%
Extend the User Experience	25–30%
Extend Microsoft Power Platform	35–40%
Develop Integrations	10–15%

Key Knowledge Areas for the AB-400 Exam

1. Build Microsoft Power Platform Solutions (15–20%)

This domain focuses on designing and building Power Platform solutions.

Candidates should understand:

• Solution design and component selection
• Component selection
• Authentication and authorization
• Dataverse design
• Custom development decisions
• ALM concepts

The key skill is knowing when to use standard Power Platform capabilities and when custom development is required.

2. Extend the User Experience (25–30%)

This domain focuses on improving Power Platform applications through custom user experiences.

Candidates should understand:

• Client scripting
• Power Apps Component Framework (PCF)
• Custom controls
• Power Apps code components
• Application customization

Developers should be able to create reusable and maintainable user experience extensions.

3. Extend Microsoft Power Platform (35–40%)

This is the largest AB-400 domain.

Candidates should understand:

• Dataverse plug-ins
• Custom APIs
• Platform APIs
• Azure Functions
• Power Automate extensions
• Copilot Studio workflows
• AI agent integrations

Candidates should understand how AI capabilities extend traditional Power Platform solutions and improve business application experiences.

4. Develop Integrations (10–15%)

This domain focuses on connecting Power Platform solutions with external services.

Candidates should understand:

• Dataverse events
• Data synchronization
• Custom connectors
• API authentication
• External service integration

Integration skills are essential for enterprise Power Platform deployments.

What Has Changed from PL-400 to AB-400?

The AB-400 exam keeps the core Power Platform developer skills while adding stronger focus on code extensibility, AI capabilities, and modern enterprise development.

Area	PL-400	AB-400
Exam Focus	Power Platform development and customization	Extending Power Platform solutions with code and AI
Development Skills	Power Apps, Dataverse, Power Automate, integrations	Custom code, PCF components, APIs, plug-ins, and AI extensions
AI Capabilities	Less emphasis on AI-related development scenarios	Copilot, AI agents, and AI-powered solutions
Integration	Connectors and APIs	Advanced integrations, Dataverse events, Azure Functions
ALM	Solution management and deployment basics	Enterprise ALM and deployment practices

Key Change:
AB-400 expands the Power Platform developer role from building applications to creating intelligent, extensible, and integrated business solutions with code and AI.

How to Prepare for the Microsoft AB-400 Exam

1. Master Power Platform Extensibility Concepts

Build a strong understanding of how Microsoft Power Platform solutions can be extended beyond standard configuration. Focus on when to use custom code, components, APIs, or integrations to meet complex business requirements.

2. Focus on Dataverse Development and Customization

Review key Dataverse development skills, including tables, relationships, plug-ins, custom APIs, Web API, and business logic implementation. Understanding Dataverse extensibility is essential for AB-400 success.

3. Understand Integration and ALM Practices

Review enterprise development practices, including APIs, Dataverse events, solution management, environment variables, and deployment processes. These skills help developers build scalable and maintainable Power Platform solutions.

4. Learn AI and Copilot Integration

Understand how AI capabilities enhance Power Platform solutions. Focus on Copilot Studio, AI agents, Microsoft Foundry integrations, and AI-powered application scenarios introduced in AB-400.

5. Use Valid AB-400 Practice Test Questions

Use AB-400 Practice Test Questions from PassQuestion to evaluate your readiness across Power Platform extensibility, Dataverse development, integrations, ALM, and AI capabilities. Scenario-based practice can help you understand how to select the best solution approach for real development challenges.

Prepare for the Next Generation of Power Platform Development

The transition from PL-400 to AB-400 represents Microsoft's move toward a new generation of Power Platform developers who can combine low-code solutions, professional coding skills, and AI capabilities.

The most important mindset for AB-400 is:
Understand the Requirement → Select the Right Extension Approach → Integrate Systems → Add AI Capabilities → Deliver Business Value

By preparing with Microsoft learning resources, hands-on development experience, and the most valid AB-400 Exam Guide with Practice Test Questions from PassQuestion, candidates can successfully prepare for the Microsoft Certified: Power Platform Developer Associate certification and develop skills for modern AI-powered business applications.