AB-100 Study Guide: Agentic AI Business Solutions Architect Expert (2026)

AB-100 is the exam for Microsoft Certified: Agentic AI Business Solutions Architect Expert, Microsoft’s expert-level certification for architects who plan, design and deploy AI and agent solutions across Dynamics 365, Power Platform, Copilot Studio and Microsoft Foundry. Passing AB-100 is only half of it: you also need one of 13 associate-level certifications that Microsoft lists as prerequisites, such as AI-103, AI-300, AB-620 or PL-400.

The exam costs $165 in the US and needs a scaled 700 to pass, and the English version gets a minor update on October 14, 2026. This guide covers the prerequisite path, the three skill areas and their weights, what the update changes, a 6-week study plan and the free official prep, including Microsoft’s free AB-100 Practice Assessment.

AB-100 at a glance

Checked against Microsoft Learn’s AB-100 exam page, Agentic AI Business Solutions Architect Expert certification page and AB-100 study guide on October 8, 2026.

Outside the US, Microsoft’s exam pricing data lists the AB exam family at £106 in the UK, €126 in Germany and France, ₹4,865 in India, ¥20,300 in Japan and US$140 in Australia and Canada, before tax. Microsoft notes that listed prices don’t include promotional offers or the reduced pricing available to Microsoft Certified Trainers and Microsoft partner program members. For a cross-vendor view, see what AI certifications really cost.

AB-100 prerequisites: the 13 associate certifications that qualify

This is the part that is easy to miss. Microsoft’s certification page says that in addition to passing AB-100, you must earn at least one of these associate-level certifications. Any one of them counts:

Four things to know before you pick one:

• The exam page shows an older list. On October 8, 2026, the AB-100 exam page still listed 15 options, including MB-280 and PL-200. Microsoft’s June 2026 credentials roundup lists MB-280 as retiring in July 2026 (successor AB-210) and PL-200 in August 2026 (successor AB-410), and the certification page lists only the 13 above. Go by the certification page.
• MB-330 is on its way out. The same roundup says MB-330 is expected to retire in December 2026, with AB-330 as its recommended successor. If you are choosing a prerequisite from scratch, pick one that isn’t retiring.
• Order isn’t spelled out. The certification page says you need both the AB-100 exam and one qualifying associate certification; it doesn’t say which has to come first. If you plan to sit AB-100 before your prerequisite, recheck the page before you book.
• The expert certification doesn’t lapse with the associate one. Microsoft’s renewal FAQ says an expert certification does not automatically expire if its associate prerequisite expires. You renew each one separately.

Which prerequisite fits your path

Pick the associate certification closest to the work you already do. This is our suggestion, not a Microsoft rule:

If you hold none of these yet, the prerequisite is the bigger job. AI-103, AI-300 and AB-620 are each a separate $165 exam with a 120-minute time limit, according to their Microsoft Learn pages. If AI-103 is your route, start with our AI-103 cost guide and 3-week AI-103 plan.

What changes on October 14, 2026

Microsoft’s certification and exam pages say the English version of AB-100 will be updated on October 14, 2026, and the study guide already shows “Skills measured as of October 14, 2026.” The change log is short:

• The three skill areas and the audience profile: no change.
• “Design overall AI strategy for business solutions” (inside Plan): minor.
• “Design AI and agents for business solutions” (inside Design): minor.
• “Design the ALM process for AI-powered business solutions” (inside Deploy): minor.

What it means for you: study the October 14 outline whichever date you test, because it is the only outline Microsoft now publishes and the changes are minor. Localized versions are updated about eight weeks after English. If the exam isn’t offered in your preferred language, you can request an extra 30 minutes.

Expect two sets of product names while you study. The study guide uses Microsoft Foundry and Foundry Tools, while parts of the exam page still say Azure AI Foundry, Azure AI services and Azure OpenAI. Microsoft’s Copilot privacy documentation also says Microsoft 365 Copilot is now named Microsoft Copilot, with the older names still appearing during the transition.

AB-100 skills measured and weights

Deploy is the biggest single area at 40–45%, and despite the name it is mostly about the architect’s decisions around go-live: how agents are monitored and tested, how changes move through application lifecycle management (ALM), and how security, governance and responsible AI are designed in. Microsoft notes that the bullets under each skill illustrate how it is assessed, that related topics may be covered, and that most questions cover generally available features (Preview features can appear if they are commonly used).

Skill area 1: Plan AI-powered business solutions (25–30%)

What the published outline lists:

• Analyze requirements: when agents fit task automation, data analytics and decision-making; reviewing grounding data for accuracy, relevance, timeliness, cleanliness and availability; and organizing business data so other AI systems can use it.
• Design the overall AI strategy: the AI adoption process from the Cloud Adoption Framework for Azure; multi-agent designs across Microsoft 365 Copilot, Copilot Studio and Microsoft Foundry; use cases for prebuilt agents; rules and constraints for AI components; when to build custom agents or extend Microsoft 365 Copilot; when to create custom models or customized small language models; prompt library and prompt engineering guidelines; the elements of a Microsoft AI Center of Excellence; and solutions that span several Dynamics 365 apps.
• Evaluate costs and benefits: ROI criteria including total cost of ownership, an ROI analysis for a business process, build versus buy versus extend, and a model router that sends each request to the most suitable model.

How to study it: write a one-page decision sheet. For each choice in the outline (prebuilt agent or custom agent, extend Microsoft 365 Copilot or build in Copilot Studio or Foundry, off-the-shelf model or custom model), write the business signal that tips the decision. Then practice one ROI case end to end: costs (licensing, consumption, build effort, support), benefits (hours saved, errors avoided) and total cost of ownership over a few years. Our guides to measuring AI value and baseline metrics for AI pilots walk through the same thinking on a real project, and Microsoft’s Cloud Adoption Framework AI strategy guidance is the source the outline names.

Skill area 2: Design AI-powered business solutions (25–30%)

What the published outline lists:

• Design AI and agents: business terms and customizations for Copilot in Dynamics 365 customer experience and service apps, connectors for Copilot in Dynamics 365 Sales, and agents for Dynamics 365 Contact Center channels; task agents, autonomous agents, and prompt and response agents; Copilot Studio topics (including fallback), agent flows and prompt actions; when to use standard natural language processing, conversational language understanding or generative AI orchestration in Copilot Studio; AI components in a Power Apps canvas app; the Power Platform Well-Architected Framework for intelligent workloads; data processing for grounding; proposing Foundry Tools for a requirement; and code-first generative pages with an agent feed.
• Design extensibility: custom models in Microsoft Foundry, agents in Microsoft 365 Copilot, agent extensibility in Copilot Studio (including Model Context Protocol), Computer Use agents that automate tasks in apps and websites, agent behaviors such as reasoning and voice mode, and agents in Teams and SharePoint.
• Orchestrate prebuilt agents and apps: AI features in Dynamics 365 finance and supply chain apps and in customer experience and service apps, Microsoft 365 agents for business scenarios, Microsoft 365 Copilot for Sales and for Service, Power Platform AI features including AI hub, and extra knowledge sources for finance and operations agent chats and in-app help.

How to study it: this is the widest area, so build a scenario matrix. List ten business scenarios down the side (a sales follow-up, a contact center deflection, a month-end close task) and four columns across: Microsoft 365 Copilot agent, Copilot Studio agent, Microsoft Foundry agent, and a built-in Dynamics 365 Copilot feature. Fill in which you would choose and why. Then get hands-on in a trial or development environment: build one Copilot Studio agent with a topic, a fallback, a prompt action and one Model Context Protocol connection. Microsoft’s audience profile also expects you to know open agent protocols, naming Agent2Agent (A2A) and Model Context Protocol (MCP).

Skill area 3: Deploy AI-powered business solutions (40–45%)

What the published outline lists:

• Analyze, monitor and tune: the process and tools for monitoring agents, backlog and user feedback on AI and agent usage, AI-based tools for finding issues and tuning, agent performance metrics, and telemetry for performance and model tuning.
• Manage testing: the process and metrics for testing agents, validation criteria for custom AI models, Copilot prompt best practices, end-to-end test scenarios across several Dynamics 365 apps, and a strategy for creating test cases with Copilot.
• Design ALM: for data used in AI models and agents, for Copilot Studio agents, connectors and actions, for Microsoft Foundry Agent Service, for custom AI models, and for AI in Dynamics 365 finance, supply chain, customer experience and service apps.
• Responsible AI, security, governance, risk and compliance: security and governance for agents, model security, AI vulnerabilities and mitigations (including prompt manipulation), responsible AI reviews, data residency and movement compliance, access controls on grounding data and model tuning, and audit trails for changes to models and data.

How to study it: for each of the four groups, write down who owns it, which tool they use and what evidence proves it is working. For ALM, sketch how an agent and its connectors and actions move from development to test to production, who approves each step and how you roll back. For governance, practice explaining how you would stop prompt manipulation, restrict who can see grounding data and keep an audit trail of model changes. Our pieces on logging what your AI assistants do and lightweight AI governance cover the operating side of the same ideas.

Who AB-100 is for

Microsoft’s audience profile describes an accomplished solution architect who designs AI-driven business solutions with multiple Microsoft services. It expects knowledge of core Dynamics 365 products, Power Platform, Copilot Studio, Microsoft Foundry Tools and Foundry Models; experience designing agentic-first and multi-agent solutions; responsible AI practice aligned with the Microsoft Responsible AI Standard; securing AI models and data workflows; monitoring agents through telemetry; and the ability to run an ROI analysis of an AI solution.

In practice it fits:

• Solution and enterprise architects working on Microsoft business applications.
• Senior Dynamics 365 and Power Platform consultants who are moving into agent design.
• AI or digital transformation leads with a technical background who own architecture decisions.

It isn’t a starting point. If you use Copilot at work but don’t design solutions, Microsoft’s AB-730 (AI Business Professional) is the better match, and if you lead AI adoption without building, look at AB-731 (AI Transformation Leader). Our Microsoft AI certifications guide maps every option.

A 6-week AB-100 study plan

This plan assumes you already hold, or are close to, one of the qualifying associate certifications and can give AB-100 about 5 to 7 hours a week. If Copilot Studio or Dynamics 365 is new to you, add two weeks of hands-on time first.

Prefer a plan built around your own calendar? The free AI certification study plan generator makes one.

Free official AB-100 prep

• AB-100 study guide: the full October 14 outline, the change log, and links to Microsoft Foundry, Copilot Studio and Power Platform documentation.
• Practice Assessment: free on the AB-100 exam page (sign in with a Microsoft account). Microsoft says it shows the style, wording and difficulty of the questions, that the questions are not the same as the exam’s, and that you can take it as many times as you like.
• Exam sandbox: a demo of the Microsoft exam interface and question types.
• Architect AI solutions for business productivity: the self-paced learning path on the certification page, 11 modules at the advanced level.
• Course AB-100T00-A: Architecting agentic AI business solutions: 3 days, instructor-led. Microsoft says it is not a test-prep course; it builds the architectural judgment the exam assumes and is a recommended step before focused AB-100 study.
• Exam Readiness Zone: Microsoft’s exam-prep video series, linked from the study guide.

AB-100 practice questions

HOW TO // AI doesn’t have AB-100 practice questions yet. Start with Microsoft’s free Practice Assessment: Microsoft says it is created by the same team that develops the certification exams and updated in step with them.

If your prerequisite route is AI-103, we do have free AI-103 practice questions written from Microsoft’s published outline. For every exam we cover, see AI Exam Prep, and use the AI certification index for verified facts on other AI exams.

Skip any site selling “real” AB-100 questions. Those are dumps, and they teach you answers instead of the architecture judgment this exam is built to test.

What exam day looks like

• Proctored by Pearson VUE, online or at a test center, and the exam may include interactive components.
• Microsoft Learn is open during the exam. On associate and expert exams you can open Learn in a split screen. No extra time is added, the clock keeps running, and Q&A, Practice Assessments and your profile are blocked. Use it to look things up, not to answer every question.
• Breaks: five minutes of break time are built in, the clock keeps running while you are away, and you can’t return to questions you saw before the break.
• Register with a personal Microsoft account. Microsoft warns that exam records tied to a work or school account are lost if you leave that organization.
• Retakes: 24 hours after a first fail, then 14 days between attempts, up to five attempts in 12 months, and each one is paid (Microsoft’s retake policy).
• Exam Replay: Microsoft’s offers page lists Exam Replay, a voucher plus one retake of the same exam, both taken within 12 months of purchase. The page doesn’t list a price.

Source for the timing, break and Learn-access rules: Microsoft’s exam duration and exam experience page.

Renewal: AB-100 is valid for one year

Microsoft’s credential expiration policy says role-based (associate and expert) certifications are valid for one year. To keep AB-100, pass the free renewal assessment on Microsoft Learn. It is online, unproctored and open book; the window opens six months before your expiry date; attempts are unlimited; and Microsoft says it takes about 45 minutes. If the certification lapses, you have to pass the exam again. Our guide to which AI certifications expire compares renewal rules across vendors, and the renewal tracker helps you keep dates straight.

How AB-100 compares with Microsoft’s other AI certifications

Microsoft’s June 2026 roundup also lists a second AI expert certification, Multi-Agent AI Solutions Expert (AI-500), with general availability planned for September 2026. Our Microsoft AI certifications guide compares the two expert paths, and the best AI certifications ranked puts them next to other vendors’ exams.

Is AB-100 worth it?

If you already design Dynamics 365, Power Platform or Copilot Studio solutions, AB-100 is the Microsoft credential that matches the work: it sits at Microsoft’s expert level and tests design decisions rather than clicks. It is a poor first certification, though. You need an associate certification as well, so budget for two exams if you don’t hold one, and expect to renew every year. If your job is using AI rather than designing it, the $99 business certifications are a better fit. For a team-level view, see which AI certification your IT team should get first.

HOW TO // AI is not affiliated with or endorsed by Microsoft. AB-100, Microsoft 365 Copilot, Copilot Studio, Dynamics 365, Power Platform and Microsoft Foundry are trademarks of Microsoft Corporation; we reference them descriptively. All content is original and based on Microsoft’s published study guide; we do not reproduce or reveal real exam questions. Check the official certification page before you book.

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