The My Account portal allows users to delete their Microsoft 365 Copilot activity history (which includes both input prompts and AI responses), but it does not provide a feature to review or read past interactions. Viewing interaction data is restricted to the respective Copilot apps or to administrators using Microsoft Purview eDiscovery. Furthermore, deleting the activity history only purges the chat interaction logs; it does not delete or modify any associated files, Word documents, OneNote pages, or notebooks where the user may have actively saved the Copilot-generated content.

Microsoft Learn: "Data, Privacy, and Security for Microsoft 365 Copilot" – Section: Deleting the history of user interactions with Microsoft 365 Copilot. This confirms users can delete prompts/responses via the My Account portal, while viewing requires admin tools like Purview.

Microsoft Support/Learn Documentation: "Delete your Microsoft 365 Copilot activity history" – Details the scope of deletion, confirming that standalone files and saved content outside the interaction log remain unaffected.