Not all chats migrated

MEREDITH 0 Reputation points
2026-10-30T21:09:03.6333333+00:00

The chat title still appears in my history after migration to the new Microsoft 365 Copilot experience on my android. All other chats migrated successfully. Only one long-running chat ("Personalized Fasting Journal") shows pop up "We couldn't open this chat. Please try again later."

Microsoft Copilot | Windows Copilot | Copilot+ PC
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  1. Vikki-T 13,230 Reputation points Microsoft External Staff Moderator
    2026-10-31T11:07:48.8466667+00:00

    Hi MEREDITH,

    I understand how important this long-running journal may be, especially when every other conversation migrated successfully and this is the only one that can no longer be opened.

    Since the chat title is still visible, please avoid deleting or renaming the conversation for now. The migration may still be processing that particular chat, especially if it contains a large amount of content. You can continue checking it periodically while signed in with the same account and sign-in method used previously.

    If the same error continues after the rest of your content has finished moving, this may require an account-level investigation by Microsoft Support. This is a user-to-user support forum, so moderators and community contributors cannot access your Copilot account, inspect the affected conversation, or repair its migration from the back end. You can contact Microsoft Support and provide the chat title, the exact error message, the approximate time the migration began, and a screenshot of the error. Please do not include personal journal content or other sensitive information in the public thread.

    In the meantime, keep the affected chat in your history, as deleting it could remove the remaining reference to the conversation. Thank you so much for your understanding.     

    Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

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  2. AI answer

    2026-10-30T21:10:03.4233333+00:00

    Open the affected chat in Copilot on the web using the same personal account and sign-in method; if it fails there as well as on Android, report that specific conversation through the app because Microsoft does not provide a user-side repair or remigration control.

    1. Determine whether the failure is Android-only

    1. Open the Copilot web app in a browser.
    2. Sign in using the exact same identity and method used before migration:
      • Microsoft account, or
      • Continue with Google, or
      • Continue with Apple.
    3. Open Conversations and select Personalized Fasting Journal.

    Microsoft states that eligible chats move automatically and should synchronize across devices. Personal and work/school histories remain separate, so check the account label or account switcher if both account types are configured.^1^ ^2^

    • If it opens on the web: The conversation still exists, and the problem is limited to the Android client or its synchronization. Fully close and reopen the Android app, then retry. Also install any available Copilot update from Google Play.
    • If it fails on the web with the same error: This is specific to that migrated conversation rather than the Android display alone. Proceed to reporting below.
    • If an in-app migration message provides access to previous chats: Use that link while the remaining content finishes moving. Microsoft notes that migration time varies with the amount and type of content.^1^

    2. Report the affected conversation

    In Copilot:

    1. Select … in the upper-right corner.
    2. Select Send feedback.
    3. Select Report a problem.
    4. Include:
      • The chat title: Personalized Fasting Journal
      • The exact message: “We couldn't open this chat. Please try again later.”
      • That all other chats migrated successfully
      • Whether the chat also fails in the web client
      • When the migration and failure began
      • Android device model and OS version
      • Copilot app version
      • A screenshot of the error

    These details let Microsoft distinguish an Android synchronization issue from a failure affecting the individual migrated conversation. The documented escalation route for persistent migration problems is Send feedback → Report a problem.^1^

    Do not delete the chat while it remains visible in history. The available guidance does not document a way for users to restore or manually rerun migration for one conversation.

    References

    1. Troubleshoot your content in the updated Copilot app
    2. Sync Copilot chats between your computer and phone
    AI-generated content may be incorrect. Read our transparency notes for more information.

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