Ok, I reply to myself: OTRS 3.1 admin manual is available: http://doc.otrs.org/3.1/en/html/auth-backends.html#agent-auth-backends; now it need a new line in Config.pm: $Self->{'AuthModule::UseSyncBackend'} = 'AuthSyncBackend'; Juan Clavero Almirón Gestiò d’Identitats, Firma i Custòdia Oficina de Tecnologies, Informació i Comunicacions (OTIC) Servei de Salut de les Illes Balears C/ de les Escoles, s/n - 07181 Bendinat - Mallorca Telf. +34 971.42.65.30 De: Juan Manuel Clavero Almirón [mailto:juanm.clavero@ibsalut.es] Enviado el: martes, 07 de febrero de 2012 12:43 Para: User questions and discussions about OTRS. Asunto: [otrs] ldap user authentication in 3.1-beta1 Hi, I’ve installed otrs-3.1.0.beta1 in a test environment from source (tar.gz). I’ve run web installer and I’ve copied the ldap section of my current otrs-3.0.11 config.pm I get the following error when logging as a user: Panic, user authenticated but no user data can be found in OTRS DB!! Perhaps the user is invalid. System log has the following lines: [Tue Feb 7 12:34:46 2012][Notice][Kernel::System::Auth::LDAP::Auth] User: XXXX (CN=YYYY,OU= YYYY,DC= YYYY,DC= YYYY) authentication ok (REMOTE_ADDR: ZZZ. ZZZ. ZZZ. ZZZ). [Tue Feb 7 12:34:46 2012][Error][Kernel::System::User::UserLookup][746] No UserID found for XXXX! [Tue Feb 7 12:34:46 2012][Error][Kernel::System::User::UserLookup][746] No UserID found for XXXX! [Tue Feb 7 12:34:46 2012][Notice][Kernel::System::User::GetUserData] Panic! No UserData for user: XXXX!!! Has anything changed in AuthSyncModule in otrs 3.1? Juan Clavero Almirón Gestiò d’Identitats, Firma i Custòdia Oficina de Tecnologies, Informació i Comunicacions (OTIC) Servei de Salut de les Illes Balears C/ de les Escoles, s/n - 07181 Bendinat - Mallorca Telf. +34 971.42.65.30