Basic Auth may take precedence over Win Auth on IE 6 for a website hosted on IIS 7
Issue: ===== For a website hosted on IIS 7, and having Basic and Windows Authentication both enabled we got the prompt for Basic Auth while browsing the site from IE 6. In other words IE 6 was not giving any precedence to Windows Auth over Basic Auth. Resolution: ======== We took some fiddler traces and noticed that the Basic auth was returned as the first in the list of authentication headers sent by the IIS 7 server like below
Here is the original:
Basic Auth may take precedence over Win Auth on IE 6 for a website hosted on IIS 7


