If you have your servers running LDAP server task and configured to allow anonymous LDAP authentication (the default),
don't think that the "Anonymous" ACL entry set to "No Access" in your address book (names.nsf) will prevent it from being browsed anonymously by an LDAP client. This ACL entry only applies to web-browser access to databases via HTTP protocol, not to any other Internet protocols supported by Domino. Anonymous LDAP clients will have "-Default-" level access to your NAB. Most sites have "-Default-" set to "Reader" or "Author". Be careful, especially if your servers are accessible from the Internet, your company may be acting like just another "Bigfoot" or "Four11". Spam may be on the way soon. Review all your "Authentication options" on all your Internet protocols ("Ports") on all your servers and consider NOT allowing anonymous server access as an option.