Your data · Microsoft
How long does Copilot keep your chats after you delete them?
thecontinuitylayer.com/your-data/copilot/how-long-chats-are-keptWhat Copilot's own pages say happens to a deleted chat, and when it is gone.
No
Docs grade · Says how long chats are kept after you delete them
3 November 2026
Checked on Microsoft's pages
Read from published docs, not a test we ran
Report a change →Microsoft's pages don't say so.
Microsoft says conversation activity is stored for 18 months by default but gives no removal period after a chat or account is deleted.
Microsoft's own pageChecked 3 November 2026
https://support.microsoft.com/en-us/topic/privacy-faq-for-microsoft-copilot-27b3a435-8dc9-4b55-9a4b-58eeb9647a7fHow to do it in Copilot
- 1.Your conversations (prompts and replies), for 18 months by default, unless you delete them sooner.
- 2.Memories: key details and preferences Copilot picks up from your chats, until you delete them. Memory is for personal Microsoft accounts only.
- 3.Files you share, for a short time (Microsoft's FAQ says no longer than 18 months), then deleted automatically.
- 4.Your Microsoft account data, until you close the account. After a 30 or 60 day reopen window, Microsoft deletes the data and content tied to it.
Turning memory off does not delete memories already saved, and deleting all memories does not delete your chat history. Microsoft's pages give different figures for how long shared files are kept (up to 30 days on one page, up to 18 months on another).
Microsoft's own pagesChecked 24 October 2026
The test: Says how long chats are kept after you delete them
Look for the retention period after a chat or the account is deleted.
- ✓ Yes
- A stated number of days or hours for removal from its systems.
- ½ Partly
- A period is mentioned but vague, or only for some data.
- ✕ No
- No retention period stated.
A grade of what Microsoft's own page says, never a test we ran. Scores are never for sale. How the Scorecard works.