The Telerik UI TreeView has a built-in security trimming functionality which is enabled by default.
If the URL to which the TreeView item points is not authorized, the item is hidden.
Security trimming depends on the ASP.NET MVC Authorization. Every
action method which is decorated with
AuthorizeAttribute checks whether the user is authorized and allows or forbids the request. For more information, refer to the article on ASP.NET MVC Authorization.
For more information on using a custom
AuthorizeAttribute, refer to this article.