Why Web Viewer 2.0 Blocks Some Links

Summary

Some websites do not allow their pages to appear inside other apps. Web Viewer cannot override this setting, but the website owner can change it.

How do I fix this?

If you do not control the website

Ask the website owner to allow Web Viewer. You can share the instructions below with them.

If you control the website

Web Viewer tried to display your page in an iframe, but your website blocked embedding through the X-Frame-Options header or the frame-ancestors directive in its Content-Security-Policy header. Remove this blocker with one of the following approaches:

• Option A: Remove framing restrictions (simplest). Remove X-Frame-Options and the frame-ancestors directive. This allows any website or app to embed your page.
• Option B: Allow Web Viewer only (more restrictive). Remove X-Frame-Options and use this frame-ancestors policy:

  Content-Security-Policy: frame-ancestors 'self' https://1990quebec.com https://*.officeapps.live.com https://*.sharepoint.com;

After making these changes, deploy your site and reload the PowerPoint presentation that contains Web Viewer.

Need help?

Still stuck? Contact Web Viewer support with the URL, and we can help identify the blocking header.