!Access to emails, calendar, chats, and file activity signalsCross-Service Tracking
▼ "Copilot Chat in Outlook can access user data to provide relevant responses. The accessible user data includes their emails, calendar, meetings, chats, and files limited to the following boundaries: Files in a user's OneDrive and other OneDrive files they have access to... Suggested prompts containing files are shown to the user based on interaction signals (such as if the file was accessed, modified, or shared with or by the user)."
Copilot Chat aggregates data across multiple Microsoft services — emails, calendar, meetings, chats, OneDrive files, and SharePoint — and uses interaction signals about file access and modification patterns, effectively building a cross-service activity profile.