The LDAP password is a password of your corporate account.
This authenticator enrolls automatically and it's not possible to remove it.
To test the enrolled authenticator follow the steps below:
Click the LDAP password icon in the Enrolled methods section.
Click Test button.
Enter your password to the Password field.
Click Next. You will see a message Authenticator "LDAP password" passed the test. If the provided authenticator is invalid you will see a message Invalid credentials.