Need help with Active Directory integration

Operating system

Windows

Joplin version

3.3.4

Sync target

Joplin Server

Editor

Markdown Editor

What issue do you have?

Hello everyone,
I'm having trouble connecting my Joplin server to my company's Active Directory. It seems that very few people use this feature, so there isn’t much information available online.
I followed the configuration example provided here:
AD configuration example
My goal is to automatically create users in the Joplin server's web interface based on AD users.
According to the logs, it looks like the connection to AD is successful (authentication works, and I get an error when I purposely enter a wrong password or bind DN).
However, no users are created or visible under Admin → Users after the connection, even after refreshing the web application.
I'm running Joplin using Docker. Here’s an extract of my configuration:

- LDAP_2_ENABLED=true
            - LDAP_2_USER_AUTO_CREATION=true
            - LDAP_2_HOST=ldap://ldap.fr:389
            - LDAP_2_MAIL_ATTRIBUTE=mail
            - LDAP_2_FULLNAME_ATTRIBUTE=userPrincipalName
            - LDAP_2_BASE_DN=OU=Users-Joplin,OU=Utilisateurs,DC=domain,DC=local
            - LDAP_2_BIND_DN=CN=adminuser,OU=Utilisateurs,DC=domain,DC=local
            - LDAP_2_BIND_PW=secretadminuser

Can someone help me figure out what's missing?

Screenshots

Log file