Attached is the most comprehensive guide to Creo Elements/Direct license server + client machine setup available on the web.
Here are some other useful links:
Differences between Creo Elements/Direct and Creo Direct: https://community.ptc.com/t5/Creo-Modeling-Questions/Differences-between-Creo-Direct-and-Creo-Elements-Direct/td-p/154916
Creo Elements/Direct Help Page (Unofficial): http://www.clausbrod.de/cgi-bin/view.pl/CoCreateModeling/OsdmFaq