HTTP Error 404.3 Not Found in IIS. The page you are requesting cannot be served because of the extension configuration
How To Add MIME Type On IIS is explained on this video.
Sometimes when you browse some file extension on IIS, it may not be registered as a MIME Type.
For example, .ipa extension.
if it is not registered as MIME type on IIS, you will get the HTTP Error 404.3 Not Found in IIS error when you browse the .ipa file.
To Solve this HTTP Error 404.3 Not Found in IIS error, just add .ipa as MIME type on IIS for your website.
By this way we can resolve this HTTP Error 404.3 Not Found in IIS issue.