A. A. By default if you select a directory on a server and no default file name exists then an error is returned. It is possible to change this behavior to instead of an error a directory listing is displayed

  1. Start the Internet Service Manager ( Start - Programs - Microsoft Internet Server)
  2. Double click on the computer name of the web server you wish to modify
  3. Click the directories tab
  4. Select the "Directory Browsing Allowed" box
  5. Click OK
  6. Close the Internet Service Manager

You can only set this for the whole site, not on a per directory basis. If you want to set this on a directory basis enable the directory browsing and make sure the default file name exists in directories you do not want people to be able to browse.