>>I took a look at that page and I'm not sure that's really what you want to be doing. Essentially you've forced anyone that is hitting your website to log in first, then IIS will use their security credentials when accessing anything.
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>Not if you disable Anonymous access and enable Integrated Windows Authentication - the application would then run as the user who launched the app in the web browser.

Essentially, the same thing happens (whether "automatic" or requiring the user to type it in) - with Windows auth (and depending on the browser's settings), your security credentials are passed to the server and it uses that instead.