Your colleagues cannot see your Copilot chats. Microsoft 365 Copilot only works inside your own permissions, so nobody can ask it about your mail or files. Your organisation can still keep and search Copilot conversations for compliance and audit through Microsoft Purview, the same way it can with email, so treat work chats as work records.
- Copilot only shows you content you already have access to.
- Gaps in what it can find are not leaks, they are areas it is not connected to.
More in Microsoft Copilot
Does Microsoft Copilot warn me if I paste Personal Data?
Not reliably, so do not depend on it. Some organisations set up data loss prevention policies that can block or flag sensitive information, but there is no general alert that catches every name or personal detail you paste in. Checking what you share with Copilot is always your own responsibility.
Can I refuse to be recorded or transcribed in a Teams meeting?
Only by leaving the meeting. When the organiser starts recording or transcription, Teams shows a consent message. You can accept and stay, or decline and be disconnected, but you cannot opt out while staying in the call. The same applies to people from inside and outside your organisation.
Can I make Copilot forget Sensitive Information?
Not cleanly. You can delete chats and saved memories, but you cannot make Copilot forget one item from a meeting transcript or a document it has already processed. The safest approach is prevention: do not start transcription or share files when sensitive information could come up, and be open about it if it happens.