You can set the authentication method for your Web resources with property sheets at the Web site, directory, or file level by using IIS Manager.
Credentials: Membership in the Administrators group on the local computer.
As a security best practice, log on to your computer using an account that is not in the Administrators group, and then use the Run as command to run IIS Manager as an administrator. At the command prompt, type runas /user:administrative_accountname "mmc %systemroot%\system32\inetsrv\iis.msc".
▸ To configure Web server authentication
In IIS Manager, right-click the Web Sites folder, Web site, directory, virtual directory, or file, and click Properties.