We are trying to setup a directory on a website so that it uses Windows authentication through IIS 7. We are trying to setup the directory so that only certain users have access to it. Windows authentication has been enabled and we have changed the NTFS permissions, however unless the 'users' group is added nobody can gain access even if they are individually specified. If the users group is not added we get an error 500 when accessing the folder on the website. We want to set it up so that only specific users have access. Does anybody know how to configure this using local users on the server?