The correct option is Disable organization code snippet collection for training.

This setting is the organization level control that prevents GitHub from using your organization code content for product improvement and future model training. It applies across teams and repositories and ensures that private repository code is not collected as snippets during everyday Copilot usage.

Enforce policy to block suggestions that match public code only filters the suggestions you see when they resemble public code and it does not control whether your private code is collected or used to train models.

GitHub Codespaces is a cloud development environment and it does not govern Copilot data collection or model training behavior at the organization level.

Turn on telemetry sharing for Copilot increases diagnostic and usage data sharing and it does not disable training on organization code and would move you in the opposite direction of the requirement.

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