Many of our users are being prompted for credentials to login to IIS when clicking on a link that opens an office document in an ASP.Net application (WIndows Server 2008 R2 - IIS 7.5). I have a support call with Microsoft on this issue but the person assigned to my case is absolutely clueless so I am thinking I have a better chance of getting an answer I can use here. The issue is WEBDAV is kicking in and sending additional PROPFIND, OPTIONS and HEAD requests to the IIS server when a user with IE 8 or greater and Office 2007 or greater installed on their PC clicks on the hyperlink to download and open the Office document.
Note that the application is Internet, not Intranet, and has Windows Authentication disabled and the WEBDAV feature is not installed on the IIS server. The application uses Forms Authentication.
I would hope there is some steps I can take with the IIS configuration to prevent the annoying popups for credentials from happening.
I initially tried using this article http://support.microsoft.com/kb/2019105 to come up with a solution to no avail.
Thanks in advance for the help!