eHMI login using LDAP (Active Directory)

Hi,
I’m trying to enable eHMI login of my AXC F 2152 (FW: 2024.0.8 LTS) using an Active Directory user, but it’s not working. Follow the steps here:
Security - LDAP Configuration Describes the LDAP configuration via WBM LDAP connection configuration The LDAP server enables central management of the users in a network (e.g. a Microsoft Active Directory). The PLCnext user authentication can be connected to an LDAP server. A central user management allows to manage user accounts, their passwords and group memberships at a central level. With an LDAP server there is no need to setup user accounts and passwords on every single controller. Forum - PLCnext Community PLCnext Technology from Phoenix Contact is a unique, open ecosystem for modern automation that is capable of meeting all the challenges of the IoT world. I created the following groups in AD and added „test_user“ to all of them (because I was just testing). „test_user“ is the user I want to be able to log into the HMIs and WBM.
Captura de pantalla 2025-05-23 230253.pngThen create this LDAP connection, here I suppose is the error. „test“ is the bind DN, added to the Domain Admins group to rule out a privilege issue.
Captura de pantalla 2025-05-23 230104.pngCaptura de pantalla 2025-05-23 230125.jpgCaptura de pantalla 2025-05-23 230329.pngWhen I try to log in
Captura de pantalla 2025-05-23 230040.pngTry using: test_user@ot.proyecto.com or OT-PROYECTO est_user…same error.
I appreciate any help. I’ve never tried linking anything to LDAP before. Thank you very much.

Hi,
I have a working configuration for an Active Directory Server. You configuration loks ok to me. The only thing I can see is that you are using the abbreviations with small letters. Please write CN, OU and so on in capitals. Can you post your LDAP.config file here?