AB-900 Domain 3 Deep Dive: Copilot Licensing, Pay-As-You-Go and Agent Lifecycle

Domain 3 of AB-900 is worth 25 to 30 percent of your score. It is the smallest of the three domains, and it is also the one with almost no independent study material written about it, because the features it covers are new enough that most prep content still predates them.

This brief walks the domain objective by objective, exactly as Microsoft lists it in the skills-measured document published 22 July 2026.

What domain 3 actually asks

The domain splits into three sub-objectives, and it helps to see them as a progression: understand the capabilities, then administer Copilot, then administer agents.

Copilot capabilities versus agents

The first objective asks you to compare the built-in capabilities of Copilot and agents. The distinction the exam is reaching for:

The practical consequence, and a likely question angle: turning Copilot on for a user is a licensing decision, whereas letting a user build and publish an agent is a governance decision with an approval workflow behind it.

Monthly licence versus pay-as-you-go

Microsoft calls this out specifically: compare Copilot monthly license model to pay-as-you-go, including SharePoint. That trailing “including SharePoint” is not decoration — it is telling you SharePoint agents are a named pay-as-you-go scenario.

What you can turn on and off

The objective reads identify which Copilot features can be enabled or disabled. This is a recognition objective: you are being asked to distinguish the surfaces that are genuinely under admin control from the ones that follow automatically from a licence.

Anchor it to a simple rule — admin control in Microsoft 365 Copilot is mostly exercised through licence assignment, policy, and the underlying permissions of the content itself. If a question implies you can granularly switch off Copilot's access to a specific document through a Copilot toggle, be suspicious; that is usually a permissions or sensitivity-label answer instead.

Researcher, Analyst and custom agents

Three objectives, all phrased as “identify use cases for” — which tells you the exam wants matching, not configuration.

If a scenario describes a broad, open-ended investigation, think Researcher. If it describes reasoning over a dataset, think Analyst. If it describes a repeatable, bounded task tied to particular content, think custom agent.

Copilot administration tasks

Four testable tasks:

• Assign Copilot licences. Standard licence assignment in the Microsoft 365 admin center, to users or groups. Remember from domain 1 that group-based assignment changes who gets features.
• Monitor and manage pay-as-you-go billing policies. The consumption counterpart to licensing, as above.
• Monitor usage and adoption. Two named surfaces: Copilot Analytics and the Microsoft 365 admin center. The framing is adoption — are the licences you bought being used?
• Manage prompts — saving, sharing, scheduling and deleting. Prompts are a managed object with a lifecycle, not just typed text. Scheduling in particular is easy to miss on a first read.

Agent access, creation, approval and monitoring

The final sub-objective, and the one that most clearly separates AB-900 from a Copilot user course.

The word lifecycle is doing real work here. An agent is created, approved, used, and eventually should be retired — and someone has to notice when one has stopped being used or has drifted from its purpose. That ongoing custody is the responsibility AB-900 is certifying.

Question patterns to expect

Fundamentals questions in this domain fall into a few recognisable shapes. Learning the shapes is faster than memorising every permutation.

That last row deserves dwelling on. A meaningful share of questions that look like Copilot administration resolve to permissions and labelling, because that is genuinely how the product works — Copilot inherits the access the user already has. If an answer option offers a Copilot-level switch to hide one specific document, treat it as the distractor.

A five-question self-check

If you can answer these without looking anything up, domain 3 is not where you will lose the exam.

1. Name the two admin centres involved in monitoring agent lifecycle.
2. Give one scenario where pay-as-you-go beats a monthly licence, and say why.
3. What are the four verbs in the prompt-management objective? One of them surprises most people.
4. Distinguish Researcher from Analyst in one sentence each.
5. What has to happen between a maker building an agent and colleagues using it?

How this domain connects to the rest of the exam

Domain 3 does not stand alone. An agent's blast radius is determined by the permissions and sensitivity labels from domain 2, and by the groups and roles from domain 1. Expect at least some questions that look like domain 3 but resolve to a Purview or Entra answer — which is exactly why the full exam guide recommends studying Purview first.

Frequently Asked Questions

What percentage of AB-900 is Copilot and agent administration?

Domain 3, 'Perform basic administrative tasks for Copilot and agents', is 25 to 30 percent of the exam. It is the smallest of the three domains.

What is the difference between a Copilot licence and pay-as-you-go?

A monthly Copilot licence is a per-user subscription assigned in the admin centre. Pay-as-you-go bills consumption against an Azure subscription instead, and the exam expects you to know it also applies to SharePoint agents.

What are Researcher and Analyst in Microsoft 365 Copilot?

They are specialised built-in agents. Researcher handles multi-step research across your work data and the web; Analyst works over data to produce analysis. AB-900 asks you to identify use cases for each rather than configure them.

Which admin centres do I need for agent monitoring?

The Microsoft 365 admin center and the Microsoft Power Platform admin center. AB-900 explicitly names both for monitoring agent usage, operational insights and lifecycle.

ExamCert Team

Certified IT professionals tracking the cloud, AI, and security certification landscape. Every exam brief is rebuilt against the official skills-measured document on the date shown above.