Hello Ryan Mariotti,
The DNN RadMenu we provide is actually a DNN SkinObject that wraps a regular RadMenu and uses DNN's API to retrieve the navigation data from DNN and add it as items in the RadMenu. There should be no problem feeding the same data to the RadMenu if you can retrieve it from inside the Web App.
Let me know if you have further questions.
All the best,
the Telerik team
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