The customer authorization (provided in the link you clicked) is out of date, and does not entitle you to use the Blended Threat service.
http://www.bizjournals.com/houston/news/2017/06/22/houston-electricity-co-subleases-galleria-area.html?ana=e_ae_set1&s=article_du&ed=2017-06-22&u=jgOU/1V3VO5EFsNsAqurnw0da3e4ed&t=1498162447&j=78430231