Question: When users visit the site anonymously, why it is asking for username and password?
When a user attempts to connect to a public Web or FTP site, your Web server assigns the user a Windows NT anonymous, or guest user account. Typically, this guest account has security restrictions, imposed by your Windows NT Files System (NTFS) permissions that designate the level of access and the type of content available to public users.
This error is most probably due to disabled anonymous access. You may resolve this problem by enabling and then properly configuring your Web server's anonymous access account.
Enable Anonymous Authentication in the IIS Web Server. To enable Anonymous Authentication, follow these steps:
Trouble logging in? Simply enter your email address OR username in order to reset your password.
For faster and more reliable delivery, add firstname.lastname@example.org to your trusted senders list in your email software.