Microsoft 365 Copilot Agents: 7 Key Questions

Building reliable agents requires more than prompts. Identity controls, permissions, governance, and data access all influence how securely and effectively an agent operates.

As teams begin building Copilot agents, common questions emerge around responsibility, data access, tools, and governance.  This blog answers common questions and highlights the practical best practices organizations need for successful Copilot agent development. 

Common Concerns When Building Copilot Agents — and How to Address Them

1. Does a Microsoft 365 Copilot agent use Azure Active Directory (Entra ID) for authentication and access control?

Copilot agents use Microsoft 365’s cloud identity and access controls. Users can access the agent when they have an Entra ID identity (either cloud-native or synchronized from on-premises Active Directory in a hybrid setup); users who only exist in on-prem AD and are not synchronized won’t be able to authenticate to Microsoft 365 services that host the agent.

In practice:

• AD synchronized to cloud (hybrid setup) → works because users have an Entra ID identity
• Only on-prem AD (not synchronized) → users can’t sign in to access the agent because there’s no Entra ID identity to authenticate
• Entra ID (Azure AD) → provides the sign-in and access control Copilot relies on

2. Do users need a Copilot license to use a Microsoft 365 Copilot agent?

Users without a Copilot license can still use an agent in certain scenarios. For example, they can access it through a SharePoint site or via pay-as-you-go options.

With pay-as-you-go:

• Users are charged per message, so you only pay when the agent is actually used
• You can also purchase message bundles at a lower rate for more predictable usage

Pay-as-you-go works well in setups where not everyone is fully licensed.

Typical use cases:

• Frontline workers → need quick access to information but don’t use full Microsoft 365 apps
• Occasional users → interact with the agent only when needed, not daily
• Distributed teams → where licensing every user across regions isn’t practical

3. How do you safely use web grounding in Microsoft 365 Copilot without exposing sensitive data?

If your agent is set to use only specific internal sources, it won’t go out to the internet at all. But if you enable it (for example, “search all websites”), then it will pull information from the web.

What’s important to understand:

• Your data is not sent to the Internet → it stays within your organization
• Web grounding only pulls information in → it doesn’t push your data out
• You control whether it’s enabled or not → your team decides when external information is used 

Where things can get tricky:

• Opening it to the web can make responses less consistent
• The agent may pull from any source—accurate or not
• Unless you restrict it to specific sites, it becomes a “free for all.”

So, in practice, most teams keep agents grounded in internal sources or specific websites especially when dealing with sensitive information

4. When should you build a Copilot agent in Microsoft 365 vs. Copilot Studio with Power Automate?

If your goal is to build a more autonomous agent that can trigger actions or run workflows, you’ll need Copilot Studio, which includes Power Automate.

At the Microsoft 365 Copilot level, agents primarily focus on retrieving and summarizing information. There’s very little built-in support for workflow automation. There are some preview features, but they’re not fully part of the experience yet.

That’s why the typical approach looks like this:

• Start with a basic agent in Copilot to handle simple queries
• Move it into Copilot Studio when you need automation
• Add workflows using Power Automate, APIs, or scripts

In practice:

• Copilot (M365) → works for basic, non-automated agent scenarios
• Copilot Studio → required when you need workflows and automation
• Power Automate / scripts → used to build and extend those workflows

5. How are Microsoft 365 Copilot agents managed and governed after deployment?

Publishing an agent marks the beginning of its lifecycle, not the end. Once deployed, agents require ownership, visibility, and ongoing oversight.

Governance planning should precede broad adoption.

Effective governance includes:

• Clearly assigned ownership
• Defined monitoring and review processes
• Lifecycle planning for updates or retirement

Agents should be governed with the same rigor as other enterprise systems.

6. What happens to a Copilot agent when the person who created it leaves the organization?

The most important way to prevent losing access to the agent is to avoid deleting the account immediately. Instead, export the agent and reassign it to a different account, and then reactivate it.

For now, a safer approach is to pause before taking action:

• Disable the account temporarily
• Understand what the agent is doing and where it’s used
• Then move and reassign it properly

Microsoft is working on improving this process, but today it still requires manual handling.

Best Practices for Building Microsoft 365 Copilot Agents

• Start with one clear job: Pick a single task the agent is responsible for. Focused agents perform more reliably and help with adoption than ones trying to handle multiple workflows.

• Keep the design simple (at first): Start with basic steps or a single tool before adding complexity. If you have Microsoft 365 Copilot licenses, you already have access to Copilot Studio for expanding automation later.

• Write instructions like a job description: Clearly define what the agent is responsible for, what success looks like, and when it should ask for help.

• Choose tools that match the task: Only add tools the agent truly needs. Extra tools increase complexity and make behavior harder to control.

• Let the agent ask when information is missing: Agents should ask for clarification instead of guessing. Guessing often leads to incorrect outcomes.

• Test early and get feedback often: Run small tests early and refine based on feedback. Early testing helps reveal issues quickly.

How ProArch Helps Organizations Build Successful Microsoft 365 Copilot Agents

Building effective Copilot agents is less about AI capability and more about the right use case, data, and governance decisions.

As a top Microsoft Solutions partner, we build Copilot agents with strict attention to your security, compliance, and data privacy so you get the results you’re looking for. Let’s build your Microsoft 365 Copilot Agent—talk to our experts.