A is correct: Agents extend Copilot by integrating with external enterprise systems through tools, connectors, and API plugins. They can retrieve information, update records, and automate workflows in third-party services. Standard Copilot chat is grounded in web and Microsoft 365 data and cannot natively interact with external systems. Reference: https://learn.microsoft.com/en-us/microsoft-365-copilot/extensibility/agents-overview
B is incorrect: The distinction is functional, not visual. Standard Copilot chat does not use tools and connectors to interact with external systems. Agents are specifically configured with tools and connectors that enable real-time external system integration, which chat lacks. Reference: https://learn.microsoft.com/en-us/microsoft-365-copilot/extensibility/ecosystem
C is incorrect: Declarative agents run on the same orchestrator and foundation models that power Microsoft 365 Copilot. The ability to interact with external systems comes from configured tools, connectors, and actions, not from a different AI model. Reference: https://learn.microsoft.com/en-us/microsoft-365-copilot/extensibility/overview-declarative-agent
D is incorrect: Standard Copilot chat cannot natively connect to external third-party systems. Agents are not just for access control. They provide the tools, connectors, and actions necessary to integrate with external services, which is functionality that standard chat does not offer. Reference: https://learn.microsoft.com/en-us/copilot/overview