Hello FarkasA
This notebook doesn't seem to be the latest one, no longer in the range at Digitec. If this notebook supports USB-C PD (Power Delivery), this should work without any problems. The power supply from the notebook is plugged into the USB-C port on the side opposite the cable from the multiport adapter. The cable from the multiport adapter is then plugged into the USB-C port of the notebook. The data and the power supply for the notebook then run through this. I cannot say whether this also works when the power supply remains on the notebook. But I think it should work.

The dock supplies 65W. As far as I can see, this is not enough to power your ZBook via the dock. However, the dock can also be powered via a USB-C port (i.e. like a USB hub).