I did look up the docks manual....however it doesn't seem to really specify that oddly. Its also doesn't give many details on the weird 2 in 1 cable that comes with it. There is a cable that is USB-C T3 on one end, and the other end has a USB-C T3 and a Power plug on the end. Now that end plugs into the dock no problem, and the manual seems to indicate it could be used either side, so I figured maybe I had to plug that end into the Zbook....but despite it looking like it would fit....the combo USB-C/Power side does not fit into my zbook. The ports line up...but it won't go fully in, and I don't want risk forcing it and breaking both ports. However, I have been successful in getting the zBook to push all 3 monitors. Despite the zbook having two Thunderbolt 3 Ports, I'm assuming there is bus limitation, so I can't get the 3rd monitor to run from the second Thunderbolt Port. However, plugging that 3rd monitor in the Zbooks HDMI Port seems to do the trick. So I have the one monitor plugged into the HDMI, and the other 2 Monitors plugged into both Full sized Display Ports on the Dock and daisy chained thru one of the zBooks Thunderbolt ports. Its kind of a rat king of wires and cables everywhere at the moment.....But Success!