You are going to have to give us a lot more information. Nothing should have to be done on the server side as long as your bind user has the necessary access to the user accounts that you are trying to connect to.
If your users are already in Moodle, then you need to make sure that you have the settings correct for them to log in. Specifically the password. If the system is set up to update the ldap server with info from Moodle, then your moodle passwords might have overwritten the ldap passwords.
If Moodle is telling you login info is incorrect, there are few scenarios that might be happening.
1. The login info is incorrect. Can you log into the ldap server with the same credentials you are trying to enter in Moodle? Or to another application that has ldap access. Have you tried resetting the password in the ldap server and then seeing if you can log in?
2. You have the settings wrong. Post a screenshot here with any identifying info blacked out. Is this Microsoft Active Directory? Did you follow the instructions for setting it up correctly?
3. You keep saying the user is showing as ldap in Moodle. Do you need to map your ldap accounts to existing users? Or are these new users? If they are new users, delete the moodle account and then try to log into moodle with the ldap username and password.