[opensuse-security] openldap over ssl

Hi I made address book on openldap in 10.3. It works over ssl but I saw strange behaviour. Book required user and password (simple autorization) and when I add this book to mail client, ldap ask for user and password and then ask for certifikate. Is this normal? I think at the begin should ask for certifikate and then sent the password over ssl. Regs Marcin Matyla