I want to understand please a confuse. If the Windows Authentication is Enabled, this means that no body will be allowed to login into the website application unless he has a Active Directory record (MS Exchange Server). This means definitely, that no body outside this range, can access the website. So Why the "Anonymous Authentication" property still is asked even after setting the "Windows Authentication" property to enabled?
I hope that my question is clear so I can get answered to solve my confuse, with all the thanks.