Fix SharePoint Site Logo Disappears or Returns 401/403 Errors
Question details
The SharePoint site logo is failing to display for all users in a specific site collection, and the browser's developer tools reveal HTTP 401 and 403 errors for the image request.
- Product
- Microsoft SharePoint
- Device & OS
- not provided
- Scenario
- A site collection administrator is trying to view or update the site logo, but the image fails to load for all users despite having proper administrative access.
- Observed behavior
- The site logo disappears entirely. Re-uploading a new logo does not resolve the issue, and network traffic analysis shows 401 (Unauthorized) and 403 (Forbidden) errors when the browser attempts to fetch the logo file.
Ensure you have Site Collection Administrator permissions and know how to access your browser's Developer Tools (typically by pressing F12) to inspect network requests.
Isolate the Issue Using Browser Tools and Test Sites
Determine whether the 401/403 logo errors are caused by browser cache, session states, or site-specific corruption.
Before making configuration changes, it is essential to verify if the issue is localized to a single site collection, a specific user session, or a wider tenant problem.
Open a private browsing window (e.g., InPrivate in Edge or Incognito in Chrome) and navigate to the SharePoint site. This rules out cached credentials or stale browser cache causing a false 401 Unauthorized error.
Check if the logo issue persists across different site collections in your SharePoint tenant to see if it is a global service degradation or a site-specific problem.
Provision a completely new temporary SharePoint site and upload a logo. If the logo displays correctly, it confirms the original site collection has corrupted permissions or configuration.
Press F12 to open Developer Tools, go to the Network tab, refresh the page, and locate the 401 or 403 error on the logo image request. Review the response headers to inspect the exact failure reason.
Verify Site Assets Library Permissions
SharePoint logos are usually stored in the Site Assets library. A 403 Forbidden error often occurs if this library loses its correct permission inheritance.
Escalate to Microsoft Support
If the issue is isolated to a single site collection and all permission checks pass, backend service anomalies may be the root cause requiring vendor intervention.
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Frequently Asked Questions
Why am I getting a 403 Forbidden error on my SharePoint logo when I am the admin?
Even administrators can encounter 403 errors if the Site Assets library, where the logo is stored, has broken permission inheritance, or if there is a transient synchronization issue in the SharePoint backend that fails to validate the admin token.
Where is the SharePoint site logo physically stored?
By default, when you upload a logo through the site appearance settings, SharePoint stores the image file within the 'Site Assets' document library located at the root of the site collection.
Will clearing my browser cache fix the 401/403 logo error?
It can fix the issue if the 401 (Unauthorized) error is caused by stale login tokens or conflicting cached credentials. Testing the site in an InPrivate or Incognito window is the quickest way to confirm if the cache is the culprit.
Can changing the site theme restore a broken logo?
Sometimes. Navigating to 'Change the look', modifying the site theme slightly, and saving the configuration can force SharePoint to refresh the UI and clear minor display glitches, though it rarely fixes hard permission-based 403 errors.
