Critical Copilot Data Loss After Migration

Question

Critical Copilot Data Loss After Migration

LUIS A. BRAGAGNOLO 1

All my chat history with Copilot is Gone after the update to the new Copilot. I logged in in the Web Browser, phone app, and Computer App and the result is the same: ALL IS GONE!

Please, I have very important chats, I need them back! I cannot longer trust in Microsoft!

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Answer 1

Vikki-T 9,595 Microsoft External Staff Moderator

Hi LUIS A. BRAGAGNOLO,

I understand how concerning this must be, especially when those conversations contain important information and the same issue appears on every device.

To help narrow this down, could you please confirm:

Were the missing chats created using a personal Microsoft account, a work/school account, or a Google/Apple sign-in?
Are you now signed in with the exact same account and sign-in method that you used before the Copilot update?
Do you see any synchronization or migration error message when signing in?
If you create a new chat now, does it remain in your history after closing and reopening Copilot?

In the meantime, please try the following:

Open the account switcher in Copilot and verify the full email address currently signed in. Personal and work/school Copilot histories are kept separate.
Sign out of Copilot completely, restart the app or browser, and then sign back in using the original account and the same sign-in method.
For a personal Microsoft account, sign in to the Microsoft privacy dashboard and check Privacy > Empower your productivity > Copilot > Your Copilot app activity history. If available, choose Export all activity history to see whether the previous activity is still associated with the account.
Please avoid deleting any visible history entries, clearing Copilot activity history, resetting the app, or reinstalling it for now, as these actions are unlikely to resolve an account-wide synchronization issue.

Since the history is missing from the web, mobile app, and computer app, this is unlikely to be limited to one device. If the chats remain unavailable, please contact Microsoft Copilot Support and provide the account type, approximate date of the update, affected platforms, screenshots, and any exact error message. Support can investigate account-specific synchronization issues that cannot be checked through this user-to-user forum. Thank you so much for your understanding.

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LUIS A. BRAGAGNOLO 1 Reputation point

2026-09-09T12:22:22.54+00:00
Thank you for the response.

The missing chats were created using my personal Microsoft account.

I am signed in with the exact same Microsoft account and sign-in method that I have used for over a year.

The old Copilot app displays the following message: "Your Copilot has moved. Pick up right where you left off. Your account and chats are moving over."

There are no synchronization or migration errors displayed in the new Copilot experience.

New chats are saved correctly and remain in history after reopening Copilot. The issue is that all historical chats have disappeared.

Additional information:

The history is missing from copilot.microsoft.com.

The history is missing from the mobile app.

The history is missing from the desktop application.

The same Microsoft account is being used across all platforms.

Multiple users are reporting similar issues following the recent Copilot migration/update.

Based on the fact that the history is missing from every platform, this does not appear to be a device-specific issue.

Can Microsoft confirm whether there is an active incident affecting conversation history migration or account synchronization?

Can Microsoft verify whether the previous conversation history still exists on the backend for affected accounts?

Everything is just gone, I am using the same exact microsoft personal account [moderator's note: PII removed]@hotmail.com

Seriously, where is everything?

Thanks
Vikki-T 9,595 Reputation points Microsoft External Staff Moderator

2026-09-10T09:18:02.5233333+00:00

For your privacy and security, I have covered the personal information included in your post. Please avoid sharing any personal or sensitive information publicly, such as serial numbers, order details, email addresses, phone numbers, or case-related information.

Hi LUIS A. BRAGAGNOLO,

Thank you for providing these details. Since new chats are saved correctly, but all conversations created before the migration are missing across the web, mobile, and desktop apps while using the same personal Microsoft account, this does appear to be related to the account migration rather than an individual device.

Unfortunately, as this is a user-to-user support forum, moderators and contributors do not have access to Microsoft’s service status, account migration records, or backend conversation data. Therefore, I cannot confirm whether there is an active incident or verify whether the previous conversations still exist on the backend.

At this point, please contact Microsoft Copilot Support and include the migration message, the approximate date the chats disappeared, the affected platforms, and the screenshots you shared. Please also mention that new conversations are saved normally but all pre-migration history is missing.

In the meantime, please avoid deleting your Copilot activity history or resetting the account. You may also check the Microsoft privacy dashboard and export your Copilot activity history to see whether any previous interactions are still associated with the account.

I understand how important these conversations are, and I hope Support can investigate the migration status of the account more closely. Thank you so much for your cooperation.