Comprehensive and Detailed Explanation From Microsoft AB-620 Study Guide: The partner capability is described as an agent available only through a standardized agent-to-agent endpoint. That is the defining use case for an Agent2Agent connection. In Copilot Studio, the primary agent is configured with the external agent ' s A2A message endpoint and the applicable authentication details, after which orchestration can delegate shipment-tracking requests to it. An MCP server exposes tools or resources rather than an independently orchestrated partner agent, so option C changes the integration contract. An indexed knowledge source is also unsuitable because shipment status is dynamic and the requirement is delegation, not retrieval from a copied corpus. Generative responses in the primary agent would have no authoritative live shipment source and would violate the defined architecture. The A2A description should identify shipment tracking precisely so that it does not compete with unrelated agents or tools. Because external-agent support can be preview functionality, Fabrikam should also validate regional availability, authentication, error behavior, latency, and governance before production use. Study Guide alignment: Integrate and extend agents in Copilot Studio > Configure multi-agent collaboration from Copilot Studio > Create a multi-agent solution by using A2A protocol.

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Comprehensive and Detailed Explanation From Microsoft AB-620 Study Guide: The Service Desk Agent must be both published and available for connections from other agents. Publishing establishes a runtime version that the primary agent can call; an unpublished draft is not a valid connected-agent target. On the Service Desk Agent, the setting that allows other agents to connect and use it must also be enabled. Microsoft additionally requires the connected agent to be in the same environment and the maker to own it or have it shared, but those conditions are not offered as choices. Replacing the agent with an MCP server would discard the existing agent ' s orchestration and ticket-routing logic. Adding it as a knowledge source would expose content for retrieval, not delegate an IT request to another agent. Publishing Operations Concierge alone does not satisfy the prerequisites of the target agent. After connection, the local description in Operations Concierge should clearly define when IT-specific work is delegated, because descriptions influence routing. Any later changes to the Service Desk Agent must be published before the main agent can use the updated version. Study Guide alignment: Integrate and extend agents in Copilot Studio > Configure multi-agent collaboration from Copilot Studio > Integrate an existing agent in Copilot Studio.

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Trace each answer to its source → Instruct the agent to cite sources in knowledge settings; Retrieve from the centralized index → Configure Azure AI Search as the grounding data source; Use an enterprise-approved foundation model → Select a model from the Foundry model catalog.

Comprehensive and Detailed Explanation From Microsoft AB-620 Study Guide: Each requirement is controlled by a different configuration layer. Source traceability is a presentation and grounding requirement, so citations must be enabled or explicitly required for knowledge-based responses. That allows users to inspect the material used to support a policy answer; it is not achieved merely by choosing a model. Centralized retrieval is provided by connecting the existing Azure AI Search vector index as the knowledge source. This preserves the curated index, semantic or vector retrieval behavior, and enterprise management of the policy corpus instead of copying documents into the agent. Model governance is handled in the prompt configuration by selecting the approved model from the Microsoft Foundry model catalog. Publishing does not automatically replace an unapproved model, and Azure AI Search does not enforce the foundation-model selection. Together, the three settings form a complete RAG path: Azure AI Search retrieves authoritative passages, the governed model produces the response, and citation settings expose provenance. The configuration should then be tested with representative policy questions to confirm that the response is grounded and that the cited source actually supports the answer. Study Guide alignment: Integrate and extend agents in Copilot Studio > Integrate agents with Azure > Configure generative answers by using Azure AI Search with Foundry; Configure custom prompts to use the Foundry model catalog.

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