Comprehensive and Detailed Explanation From Microsoft AB-620 Study Guide: The tenant administrator has already configured a Copilot connector that indexes the external system into Microsoft Graph. The agent should consume that approved enterprise knowledge source from its Knowledge configuration. This lets generative answers retrieve authorized indexed content without recreating the connector, uploading duplicate documents, or treating the source as a callable transaction. Copilot connectors are designed for enterprise search and knowledge grounding; the user ' s access is evaluated so that responses surface only content the user is permitted to see. A custom connector is appropriate when the agent must call an API or perform an operation, which the scenario explicitly excludes. Adding the connector as a tool would likewise shift the design from retrieval to invocation. Manual file upload would create a second, potentially stale copy and break the administrator-managed indexing lifecycle. After adding the source, the builder should provide a clear name and description, test representative questions, confirm citations or source attribution, and verify that restricted users cannot retrieve unauthorized material. Study Guide alignment: Integrate and extend agents in Copilot Studio > Connect to enterprise knowledge sources > Connect to Copilot connectors.

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