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How to Fix Cannot Embed Site24x7 Content in a SharePoint Embed Web Part

Olivia Miller Sep 28, 2026 868 views

Question details

The user needs to successfully embed a Site24x7 iframe into a SharePoint site using the Embed Web Part.

Fixing Site24x7 Content Not Embedding in a SharePoint Web Part

Product: Microsoft SharePoint
Device & OS: not provided
Scenario: Attempting to display external monitoring content from Site24x7 on a SharePoint team site page.
Observed behavior: The SharePoint site rejects the iframe embed code, even after the Site24x7 domain is explicitly added to the HTML Field Security settings.

Before you start

Ensure you have site owner permissions to modify HTML Field Security settings in SharePoint and access to the external iframe code you are trying to embed.

Solution 1Recommended

Verify Content-Security-Policy and X-Frame-Options Headers

Confirm that the external site (Site24x7) allows its content to be embedded externally via iframes before adjusting further SharePoint settings.

Even if SharePoint allows an external domain, the external server itself might block iframe embedding for security reasons. Checking the browser's network requests will reveal if the site is actively rejecting the connection.

Open Developer Tools

Press F12 or right-click the page and select 'Inspect' to open your browser's Developer Tools, then navigate to the 'Network' tab.

Inspect the Rejected Request

Reload the SharePoint page and locate the network request for the Site24x7 iframe URL that is failing to load or showing a connection error.

Check Security Headers

Click on the request and check the 'Response Headers' section. Look for 'X-Frame-Options' or 'Content-Security-Policy' headers that restrict embedding to 'SAMEORIGIN' or 'DENY'.

Verify Content-Security-Policy and X-Frame-Options Headers

Header Restrictions: If the external site strictly blocks iframe embedding through its own headers, no SharePoint setting can override this behavior.

Solution 2

Escalate to Microsoft 365 Support with Diagnostic Logs

If headers permit embedding and HTML Field Security is configured correctly, escalate the issue to Microsoft support for backend investigation.

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Frequently Asked Questions

Why is my SharePoint HTML Field Security not allowing an iframe?

It can take time for HTML Field Security settings to propagate across your SharePoint site. Alternatively, the external site you are trying to embed (like Site24x7) might be actively blocking iframes using 'X-Frame-Options' or 'Content-Security-Policy' headers, which SharePoint cannot override.

How do I add a specific domain to SharePoint HTML Field Security?

Navigate to your SharePoint Site Settings, look for 'Site Collection Administration', and click on 'HTML Field Security'. Select 'Allow contributors to insert iframes from the following domains', enter the domain name (e.g., site24x7.com), click 'Add', and then save your changes.

What are HAR logs and how do I get them for Microsoft support?

HAR (HTTP Archive) logs record detailed network interactions between your browser and a website. You can generate them by opening your browser's Developer Tools (F12), going to the 'Network' tab, reproducing the embed error on your SharePoint page, and clicking 'Export HAR' (the downward arrow icon) to save the file.

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