Microsoft 365 Copilot
Microsoft says files, communications, prompts, responses, and Microsoft Graph data used with Microsoft 365 Copilot are not used to train foundation models.
Microsoft 365 Copilot data is stated not to train foundation models.
No opt-out is required for that stated foundation-model training posture.
Microsoft says Copilot operates within the Microsoft 365 trust boundary and respects organisational permissions.
Retention follows Microsoft 365 controls and organisational policies rather than a single public consumer-style retention setting.
The cited commercial documentation focuses on tenant controls, permissions, and compliance rather than consumer-style human-review language.
Foundational reference pages for teams adopting, deploying, and operating production AI with inspectable controls.