As you may already know, if not this is done Smile, you can now embedded some HTML code on your SharePoint pages (available on SharePoint 2013 and SharePoint Online); especially on blog post.

To do so, just create a new blog post (or page) and use the Insert tab and Embed Code button.

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However, there is some security settings associated with this option.

I ran onto an issue when I tried to embedded a Slideshare presentation I just uploaded earlier.

This HTML cannot be inserted because this type of content is not allowed.

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After digging a little bit on this issue, the security settings associated with the embedded code option is available at the Site Settings\Site Collection Administration\HTML Field Security option

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When you go there, you can allow/disallow embedded code and then if allowing, manage from which domain embedded code is allowed. By default, there is only YouTube, Bing, Skydrive and Office.

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