Hi i'm very new to fedora ds and ldap in general, i just downloaded ldap a couple of weeks ago and i have been playing around with it for some time, i'm trying create an directory server and have postfix and samba users authenticate against it, i've been through tutorials on the net expecially fedora ds wiki, but every howto looks at it from a migraton scenario whereas i'm trying to build this from scratch anyway tried going through the tutorials but i get stuck when i try to add a user with ldapmodify -a i get an error uknown object class courierMailAlias tried searching for the objectclass on the net but to no avail... can anybody please shed some light thanks