Telerik Reports are processed and rendered on the server in the selected format, where HTML input can be displayed via HtmlTextBox item. Please check the list of the supported HTML tags and CSS attributes
(which does not include font awesome elements).
In general, all items are processed and rendered by Telerik Reporting mechanism and the original HTML of an HtmlTextBox is not placed directly in the final document.
Instead you can use an image as an item's background image or a PictureBox.Value
Let us know if you have any further questions.
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