Tested with version 0.11.2 of Trac. Trac.ini important properties are: [ldap] host = bind_user = bind_passwd = basedn = user_rdn = [1] attempts = 1 [2] user_filter = uid [2] [3] Attempts it's a number that indicates retry connecting to the LDAP server. It's optional. [1] It is just necessary to change the password [2] Optional fields [3] For Active Directory use "sAMAccountName" instead "uid"