Microsoft 365 Copilot does not train the underlying large language model on your organization’s tenant data. Instead, it uses your organization’s data at run time to ground responses (for example, by retrieving relevant emails or documents you have permission to access). This separation protects confidentiality and supports enterprise compliance.

If a mailbox (or specific folders) is shared with you and your account has the required permissions, Copilot can summarize emails from that shared content because Copilot respects Microsoft 365 access controls (“permission trimming”).

Copilot also relies on Microsoft 365’s established security and compliance framework—identity, permissions, and policy enforcement—so it only surfaces content you’re authorized to see. This ensures Copilot’s outputs remain aligned with organizational governance, information protection, and least-privilege access principles.

a specific date range of activity

The Microsoft 365 My Account portal provides users with control over their Copilot activity history in alignment with enterprise privacy and compliance standards. When selecting Delete history , users can remove Copilot activity based on a defined time range rather than deleting only a single conversation or all activity universally.

This functionality reflects Microsoft’s commitment to transparency, user control, and responsible AI governance. Allowing deletion by date range enables organizations and individuals to manage data retention policies efficiently while maintaining compliance with regulatory frameworks such as GDPR and internal data governance policies.

The other options are incorrect because deleting a specific conversation or all conversations with a specific agent is not the primary method offered in the My Account activity deletion setting. Instead, deletion is structured around activity time periods.

This capability reinforces generative AI best practices: secure data management, lifecycle control of AI interactions, and user-directed privacy management within enterprise environments.

Microsoft 365 Copilot in Teams is designed to provide real-time meeting assistance, including summarizing discussions, identifying key decisions, and highlighting action items. When joining a meeting late, the most efficient and immediate method to catch up is to directly prompt Copilot within the Teams meeting experience.

Option A is the best answer because Copilot in Teams can summarize what has occurred so far during the live meeting. It leverages the meeting transcript, speaker attribution, and contextual signals to generate a concise, structured summary in real time. This minimizes delay and provides actionable insights instantly.

Reading the transcript (Option B) would require manual review and is not the fastest method. Intelligent recap (Option D) is typically available after the meeting concludes and processes recording data. Asking Copilot from the separate Microsoft 365 Copilot app (Option C) may not provide immediate, in-meeting contextual awareness.

Therefore, the fastest and most effective approach is to ask Copilot in Teams to summarize what you missed.