Go to an Visual COBOL command prompt and try to start ESDEMO:
casstart /uES-admin /pES-password
where ES-admin and ES-password are the username and password of the user you edited in step 4 to grant ES administration permissions. (You can also start ESDEMO from MFDS and supply a username and password in the Use Enterprise Server credentials form, but this is easier to run again if you need to correct a typo or other problem.)
LDAP clients, such as the MLDAP ESM module, use a user's Distinguished Name (DN), which is formed using the user's Common Name (CN), and the Common Name is set by Windows when the user is created. By default, Windows sets the common name to the user's first name, middle initial, and last name.
Since the MLDAP ESM only uses the common name, it doesn't matter if the logon name is different, but users might be confused if they can log on using their common name but not their logon name. Also, if the common name is longer than 8 characters or contains spaces, that may cause difficulties with the current version of ES. (Future ES versions will support long names better.)
You can change a user's common name by renaming the user in Active Directory Users and Computers. After you rename the user, you can go back and reset the user's first and last name and display name (under the General tab of the Properties dialog), if you wish.