[otrs] customer user login with email address

hi, I want to setup otrs customer users ldap the next way: We want to login on customer users interface with email address not with LDAP uid. user record in ou=People uid=firstname.lastname,ou=People,dc=mycompany,dc=com email is: firstname.lastname@mycompany.com so login will be: login: firstname.lastname@mycompany.com password: *********** is there any possibilities to realise this ? what should be the best approach ? thanks for help norbert ------- Norbert Bede, CEO MULTIMAGE s.r.o. Šulekova 2, 811 06 Bratislava SLOVAKIA