EndNote can automatically find and upload many PDFs into your EndNote Library. (Note: This process is only available ON CAMPUS because it is authenticated by IP addresses.) While it will find many of the article you need automatically, it won't find them all because Auraria Library does not have access to all materials.
If the above does not find the PDF, you can always download a PDF to your computer and manually attach to a reference by using the paperclip icon on the editing page of the reference.