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Hello IVAN INFANTE,
Thank you for confirming that you are using your Stellantis work account. That distinction is important, as the migration guidance for personal Copilot accounts may not fully apply to a corporate Microsoft 365 account.
Microsoft’s documentation indicates that previous conversations for work or school accounts should normally be available from the Chats list in Copilot Chat. However, from the forum, I cannot verify whether the missing history is still being synchronized or confirm that it will automatically reappear after the transition.
Since your previous conversations remain unavailable under the correct work account, I recommend contacting your organization’s Microsoft 365 administrator or IT support team. They can check whether any organizational policy, account configuration, or service issue is affecting Copilot Chat and, if necessary, open a support request with Microsoft for a tenant-level investigation.
When reporting the issue, please include when the history disappeared, where you access Copilot, and whether newly created conversations remain visible after you close and reopen Copilot. These details can help distinguish an issue affecting only the previous history from a broader synchronization problem.
Please note that this is a user-to-user support forum. Community contributors cannot access corporate tenant settings or back-end synchronization data.
You can also refer to Microsoft’s guidance on how Copilot Chat history works: How Microsoft Copilot Chat history works
Thank you for your understanding.
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