The customer authorization (provided in the link you clicked) is out of date, and does not entitle you to use the Blended Threat service.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.gearedmotorspares-lenzegst.co.uk/lenze-gst-gearbox-products/lenze-185kw/lenze-185kw-277rpm/lenze-gst-geared-motor-185kw-277rpm-619nm-c-16/