Microsoft is currently rolling out a change for Microsoft 365 Copilot Library, which replaces the existing Pages library in Microsoft 365 Copilot Chat.
Microsoft seems to have forgotten something important:
The old Pages library used the path m365.cloud.microsoft/pages, while the new Library now uses m365.cloud.microsoft/library/pages.
If this change has been implemented in your tenant and you try to open the old path, the browser will log a 301 Permanently Moved response and redirect you to Microsoft 365 Copilot Search instead of Pages in the new Library.
What is the impact?
All your previously shared Copilot Pages now redirect to the Microsoft 365 Copilot Search page because the sharing links still reference the old path. This path is no longer available. Microsoft hasn’t updated it to point to the new Library path.
This also affects newly created Copilot Pages, which now use the file type .page instead of .loop.
Example of an old sharing link (shortened for readability):
https://<tenant>.sharepoint.com/:fl:/r/contentstorage/…/Copilot/Testpage.loop?d=w4a7de49d3a9243b1bde9f770091fe653&…
Example of a new sharing link (shortened for readability):
https://<tenant>.sharepoint.com/:fl:/r/contentstorage/…/Copilot/CopilotPage25102025.page?d=w240e767a8b784240afa662b5ffdaa706&…
You have no issue with the sharing links if the new Library is not yet visible in your tenant.
What happens?
- The browser sends a GET request to open the sharing link.
- The request redirects to m365.cloud.microsoft/pages, which is no longer available after the Library rollout.
- Because of step 2, users end up on m365.cloud.microsoft/search instead of a shared Copilot Page.
In short, Microsoft has misconfigured or forgotten the redirect.
Copilot Pages are now located at m365.cloud.microsoft/library/pages, but the Pages sharing links point to the old path. As a result, all existing Copilot Pages sharing links (including newly created links) are broken until Microsoft updates the redirect mapping.
