These fields are optional. You can choose to pre-fill some Moodle user fields with information from the LDAP fields that you specify here.If you leave these fields blank, then nothing will be transferred from LDAP and Moodle defaults will be used instead.In either case, the user will be able to edit all of these fields after they log in.Update local: If enabled, the field will be updated (from external auth) every time the user logs in or there is a user synchronisation. Fields set to update locally should be locked.Lock value: If enabled, will prevent Moodle users and admins from editing the field directly. Use this option if you are maintaining this data in the external auth system. Update external: If enabled, the external auth will be updated when the user record is updated. Fields should be unlocked to allow edits.Note: Updating external LDAP data requires that you set binddn and bindpw to a bind-user with editing privileges to all the user records. It currently does not preserve multi-valued attributes, and will remove extra values on update.