[SM-USERS] how do I disable 'list all' functionality for ldap addressbook

[Brian G. <bg...@si...>]

I've got squirrelmail working fine with our ldap server functioning as a global address book. Is it possible to disable/remove the
"list all" functionality from the address screen though? I don't want our users sending to everyone in the college using this. I
found the "Allow listing of global file address book" setting, but setting it to "false" doesn't seem to have any effect.