I have setup a delegated LDAP authentication and everything works well now for about a year. Now I need to change the LDAP server (because the old one will be decommissioned). So I created a new user directory with the new server configured. The test connection works, but when I try to log in, it tells me that the username or password is incorrect.
So then I created a user directory with the identical configuration as the working one (same sever name), and it still doesn't work.