Having an issue with a PDF viewer web part on our SharePoint 2013 server. Regardless of the user level or browser, it will give an "Access Denied" error.
The strange thing about this is that we have a VM with SharePoint on the server (purely for testing content before we add it to the live site) which opens them completely fine. From what I can see, the central administration settings are also all the same, and the PDF is stored in a document library within SharePoint which everyone has the correct rights to see.
Opening the PDF manually is completely fine, and we're running Adobe Acrobat XI.
Any ideas would be greatly appreciated.