Microsoft Copilot privacy policy changes

Training on chats

For the updated app (from August 18, 2026, personal accounts): “Prompts, responses, and your file contents when using the Microsoft Copilot app aren’t used to train foundation models.” The page does not define foundation models or say whether chats are used for other models.support.microsoft.com (company page, opens in a new tab)

Ads

Personalized ads might use chat history, saved memories and other Microsoft data you chose to share. Users under 18 don’t see personalized ads.support.microsoft.com (company page, opens in a new tab)

Your control

Settings > Personalization > Allow ads personalization. The updated app’s privacy controls page lists no model-training opt-out.support.microsoft.com (company page, opens in a new tab)

Older Copilot app

The older app’s FAQ says Microsoft uses Copilot data “for AI training” unless you opt out of training “Microsoft’s generative AI models,” and stores conversation activity for 18 months by default.support.microsoft.com (company page, opens in a new tab)

Work and school accounts

Microsoft’s enterprise data protection page says that for organizations, prompts, responses and data accessed through Microsoft Graph “aren’t used to train foundation models.”learn.microsoft.com (company page, opens in a new tab)

Our guide: Is ChatGPT Private? What OpenAI Can See, and How Other AI Chats Compare