Free Microsoft AB-620 Exam Dumps September 2026

Environment variables separate deployment-specific configuration from the agent's solution components. Therefore, external references---such as endpoint URLs, resource identifiers, and other environment-dependent settings---should be stored as environment variables. The same agent definition can then move through development, testing, and production while administrators provide the appropriate value in each target environment. This satisfies option C and is fundamental to Power Platform application lifecycle management.

Environment variables exposed inside Copilot Studio are read-only. Agent authors can consume their values but cannot edit them directly while authoring topics. Administrators or authorized makers must modify the current values through the appropriate Power Platform administrative or solution-authoring experience, making option F correct and option E incorrect.

When a non-secret environment variable is updated, an already published agent does not automatically begin using the new value. The agent must be republished so its published runtime configuration incorporates the change, which makes option D correct. Secret environment-variable values are handled differently because they can be retrieved dynamically at runtime.