Hi
I reply myself...here is my working configuration authenticating galaxy with my openldap server
With this setup, the first login to galaxy has to be done with username/password so the account is created in the galaxy db with the email fetched from ldap. Once the account exists in galaxy db the login can be done with username/password or email/password.
The search-filter is looking for uid and mail fields from my ldap database. I also fetch the dn field to connect to ldap using dn/password
regards,
Pablo.