When attempting to import users from AD no results were being returned in a dropdown window where candidates matching the spelling of the name should be displayed.
Depending on how Active Directory user accounts are looked up (last name first, or first name first) the process attempting to render a list of candidates does not receive any results from the LDAP stream.
Release : 6.8.1
Try typing in the first name of the user (not their login name). If that doesn't work then try the user's last name.