This post is a part of the AB-900: Microsoft 365 Copilot and Agent Administration Fundamentals Exam Prep Hub.
This topic falls under these sections:
Perform basic administrative tasks for Copilot and agents (25–30%)
--> Understand features and capabilities of Copilot and agents
--> Identify use cases for custom agents
Note that there are 10 practice questions (with answers) at the end of each section to help you solidify your knowledge of the material. Also, there are 4 practice tests with 30 questions each available from the hub's main page below the exam topics section.
Introduction
Custom agents in Microsoft 365 Copilot extend Copilot’s built-in capabilities by allowing organizations to create tailored AI assistants focused on specific business processes, data sources, and workflows. Unlike general Copilot experiences, custom agents are designed to operate within defined boundaries, grounded in organizational knowledge and governed data.
What are custom agents?
A custom agent is a specialized AI assistant built on top of Microsoft 365 Copilot that can:
- Use organization-specific knowledge sources (SharePoint sites, files, Dataverse, web connectors, etc.)
- Follow predefined instructions and behaviors
- Perform scoped tasks such as answering domain questions, generating structured outputs, or assisting workflows
- Operate with Microsoft 365 identity and security controls
They are typically built using tools like Copilot Studio and integrated into Microsoft 365 experiences such as Teams, SharePoint, or Copilot chat.
Key characteristics of custom agents
Custom agents differ from general Copilot usage in several important ways:
They are purpose-built, meaning they are designed for a specific function such as HR support or IT helpdesk assistance. They are also data-grounded, relying on selected enterprise knowledge sources rather than broad internet knowledge.
They are governed, meaning they respect Microsoft 365 permissions, Microsoft Purview policies, and organizational compliance boundaries.
Finally, they are interactive and task-oriented, often guiding users through structured processes rather than only responding to ad-hoc questions.
Common use cases for custom agents
1. HR and employee support agents
Custom HR agents are commonly used to:
- Answer questions about leave policies, benefits, and onboarding
- Guide employees through HR workflows
- Retrieve policy documents from SharePoint or HR systems
This reduces HR ticket volume and improves employee self-service.
2. IT helpdesk and support agents
IT-focused agents can:
- Troubleshoot common issues (password resets, device setup, VPN access)
- Provide step-by-step remediation guidance
- Surface knowledge base articles from internal documentation
These agents help reduce repetitive IT support requests.
3. Sales and customer support agents
Sales agents are used to:
- Summarize customer accounts and opportunities
- Retrieve CRM data and product information
- Generate sales emails or proposals
Customer support agents can also respond to common inquiries using approved knowledge bases.
4. Knowledge management agents
Organizations use agents to:
- Provide structured access to company policies and documentation
- Answer questions across multiple SharePoint sites
- Improve search and discovery of internal content
These agents are especially valuable in large enterprises with distributed knowledge.
5. Finance and operations agents
Custom agents in finance or operations can:
- Assist with budget tracking queries
- Explain financial reporting definitions
- Summarize operational KPIs or dashboards
They typically connect to controlled datasets and reporting systems.
6. Project and workflow assistants
These agents help teams by:
- Tracking project status updates
- Summarizing meeting notes
- Guiding users through standardized workflows (e.g., project intake, approvals)
When to use custom agents vs standard Copilot
Custom agents are most appropriate when:
- A repeatable business process exists
- The organization has curated knowledge sources
- Responses must follow strict formatting or rules
- Domain-specific accuracy is required (HR, finance, IT, legal)
Standard Copilot is better for:
- General productivity tasks (writing, summarizing, brainstorming)
- Ad hoc questions that do not require structured workflows or specialized data
Governance considerations
Custom agents inherit Microsoft 365 security and compliance controls, including:
- Microsoft Entra ID authentication
- Microsoft Purview sensitivity labels and DLP policies
- Role-based access control (RBAC)
- Data access restricted by user permissions
This ensures agents do not expose information beyond what a user is authorized to see.
Summary
Custom agents in Microsoft 365 Copilot are specialized AI assistants designed for targeted business scenarios. They extend Copilot by adding organizational knowledge, structured workflows, and governance controls. Their primary value lies in automating repetitive tasks, improving knowledge access, and supporting domain-specific processes across departments such as HR, IT, finance, and operations.
Practice Exam Questions (10)
1.
A company wants an assistant that can answer employee questions about vacation policies using only internal HR documents stored in SharePoint. What is the best solution?
A. Use a custom Copilot agent grounded in HR SharePoint content
B. Use Microsoft Excel Copilot only
C. Use a Power BI dashboard
D. Use a generic web Copilot chat
Answer: A
Explanation: A custom agent can be grounded in specific SharePoint HR content and provide controlled, policy-based responses.
2.
Which scenario best represents a use case for a custom agent?
A. Writing a marketing email from scratch
B. Generating creative ideas for a product name
C. Answering general trivia questions
D. Guiding users through an IT password reset workflow
Answer: D
Explanation: IT helpdesk workflows are structured, repeatable, and ideal for custom agents.
3.
What is a key benefit of using custom agents in Microsoft 365 Copilot?
A. They bypass Microsoft security controls for faster responses
B. They only use public internet data
C. They enforce organizational policies and use approved data sources
D. They eliminate the need for user authentication
Answer: C
Explanation: Custom agents respect Microsoft 365 governance and use controlled enterprise data.
4.
A finance team wants an AI tool that summarizes monthly budget reports stored in controlled datasets. Which capability is most appropriate?
A. Custom finance agent grounded in approved financial data
B. Personal Microsoft Word Copilot
C. Bing search integration
D. Email auto-responder rules
Answer: A
Explanation: Finance use cases require structured, governed access to internal datasets.
5.
Which tool is commonly used to create custom agents for Microsoft 365 Copilot?
A. Power Automate only
B. Copilot Studio
C. Azure DevOps
D. Microsoft Access
Answer: B
Explanation: Copilot Studio is used to build and configure custom agents.
6.
What distinguishes a custom agent from standard Microsoft 365 Copilot?
A. It can only work offline
B. It uses only unstructured internet data
C. It is built for specific business scenarios and uses curated data sources
D. It replaces all Microsoft 365 applications
Answer: C
Explanation: Custom agents are scoped to specific business needs and data sources.
7.
Which is a valid HR-related use case for a custom agent?
A. Generating random social media posts
B. Answering employee benefit questions from policy documents
C. Editing video content
D. Running system diagnostics on servers
Answer: B
Explanation: HR agents provide policy-based answers from controlled documentation.
8.
What ensures a custom agent does NOT expose unauthorized data?
A. Internet firewall rules
B. Microsoft Defender antivirus only
C. User identity and Microsoft 365 permissions
D. Manual approval of every prompt
Answer: C
Explanation: Access is controlled through Microsoft Entra ID and existing permissions.
9.
When should a custom agent be preferred over standard Copilot?
A. When tasks are ad hoc and creative
B. When structured workflows and specific business rules are required
C. When browsing public websites
D. When no data sources are needed
Answer: B
Explanation: Custom agents are ideal for structured, repeatable workflows.
10.
Which department would most likely benefit from a knowledge management agent?
A. HR requesting policy document access
B. Users playing games
C. Graphic design teams creating artwork
D. Hardware repair technicians fixing printers
Answer: A
Explanation: Knowledge management agents help retrieve and summarize internal policies and documentation.
Go to the AB-900 Exam Prep Hub main page
The Data Community 