Missing files/projects in Copilot

Escalate the missing Projects through the route matching your account type, because Microsoft provides no end-user control to force the migration or restore missing server-side content.

Microsoft states that Projects were renamed to Notebooks and that existing Projects should appear under Notebooks in the left navigation. Content differences between devices can occur while data is still moving, which fits—but does not conclusively diagnose—the fact that the content remains visible on your iPhone but not on Windows or the web. ^1^

First, preserve the current evidence

While the Projects remain visible on the iPhone:

• Do not delete the visible Projects/Notebooks or clear Copilot activity.
• Record their names and capture screenshots showing the missing desktop list, loading errors, and the corresponding iPhone content.
• Note approximately when each platform last displayed the Projects correctly.
• If practical, copy any especially critical visible material somewhere safe. This is a precaution, not a substitute for restoring access.

If this is a personal account

This means a personal Microsoft account or a Google/Apple identity used with consumer Copilot.

1. On Windows, open a private browser window and go to https://copilot.microsoft.com/.
2. Sign in using the same identity and the same sign-in method used on the iPhone. For example, select Continue with Apple if that was the original method rather than entering the same-looking email through another option.
3. Interpret the result:
   • If redirected to the updated Copilot experience, the account has moved or is completing migration.
   • If it remains on the older experience, use it there while that account waits to migrate.
4. In both the web and Windows apps, check Notebooks in the left navigation, follow any in-app link offering access to previous chats, then close and reopen Copilot and refresh the web page. Microsoft notes that migration and cross-device synchronization can take varying amounts of time. ^1^
5. If the Projects remain missing, submit an engineering report from the affected desktop/web experience:
   • Select … in the upper-right corner.
   • Select Send feedback.
   • Select Report a problem.
   • Include:
     • “Projects-to-Notebooks migration”
     • When the issue started
     • Windows version and Copilot app/browser version
     • Exact account sign-in method, without posting credentials
     • Number or names of missing Projects
     • Confirmation that they remain visible on the iPhone
     • Screenshots of both device states and any loading error

That is Microsoft’s documented route for supplying the diagnostic details needed to investigate persistent migration failures. ^1^

If this is a work or school account

The personal-account migration test above is not documented as applicable to organizational identities. Contact your Microsoft 365 administrator and ask them to:

1. Check Microsoft 365 Service health for an active Copilot incident or advisory.
2. Verify that the affected identity and tenant are used consistently across the iPhone, Windows app, and web.
3. Open a Microsoft support case requesting investigation of the missing Projects-to-Notebooks migration, attaching the same cross-device screenshots, timestamps, affected notebook names, and error details.

Service degradation can affect Copilot functionality, and tenant administrators have access to Microsoft 365 service-health information unavailable to ordinary users. ^2^

Do not treat an export as resolution when the requirement is restoration of the Projects and their conversations; state explicitly in the report that the iPhone can still display the content and that the requested outcome is restored desktop/web access.

References

1. Troubleshoot your content in the updated Copilot app
2. I lost the Copilot service in my M365 office apps - Microsoft Q&A