Our website was a Windows Server 2000/IIS 5 website migrated to a Windows Server 2003/IIS 6 website using the MS migration tool. We have several forms on the website, where a user fills out information and clicks “submit” to send the information (form is set to send an email) When the user clicks on submit, it asks for a username/password. If you click on “cancel”, it will take you to a page that says you are not authorized to view this page. If you enter a domain username/password, the form will work and take the user to a confirmation page and the email will be sent. Website has anonymous access enabled (local_machine/iusr_account) and integrated windows authentication. These forms did work before the website was migrated to IIS 6