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Fix Microsoft Copilot File Picker Showing Blank When Attaching Cloud Files
Question details
Users are experiencing an issue where the file search screen remains completely blank and stuck in a loading state when attempting to attach cloud files in Microsoft Copilot.
- Product
- Microsoft Copilot
- Device & OS
- not provided
- Scenario
- Attempting to upload and attach cloud files using the Microsoft Copilot interface.
- Observed behavior
- The Upload and Attach cloud file option opens a blank file search screen that continuously loads, preventing document attachment. This problem affects all users within the organization.
Verify that your organization's network or firewall is not blocking Microsoft 365 cloud storage endpoints, and clear your browser cache to rule out local display issues.
Report the Organization-Wide Bug to Microsoft Communities
Since this file picker issue affects all users in your organization, it is likely a backend tenant synchronization or service degradation problem that requires escalation to Microsoft support.
When an interface like the Copilot file picker fails for an entire tenant, standard local troubleshooting (like reinstalling apps) will not resolve the root cause. Escalate the issue with detailed diagnostics to Microsoft's official channels.
Collect your Microsoft 365 tenant details, a list of affected users, the specific web browsers encountering the issue, and diagnostic screenshots of the continuous loading screen.
Go to the Copilot for Microsoft 365 Tech Community or the Microsoft Q&A portal.
Create a new topic describing the blank cloud file picker screen. Be sure to apply the 'Microsoft Copilot for Microsoft 365' tag so that Microsoft support engineers can properly route and investigate your tenant's issue.
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Frequently Asked Questions
Why is the Microsoft Copilot file picker showing a blank screen?
A blank loading screen typically occurs due to a backend service degradation in Microsoft 365, a tenant configuration error, or network firewall settings blocking access to Microsoft's file indexing servers.
How can I attach files to Copilot if the cloud option is broken?
As a workaround, download the necessary documents from OneDrive or SharePoint to your computer's local drive, then use the local file upload option in Copilot instead of the cloud picker.
Will clearing my browser cache fix the continuous loading issue?
If the issue is isolated to a single user, clearing the cache and cookies or using an Incognito window can resolve corrupted session data. However, if it affects all users in the organization, it is a tenant-level bug that Microsoft must address.
