I am having some difficulties with installing my brand new 9560 with SCCM. I have added "ThunderBolt Networking Verison 188.8.131.52" and "Realtek USB FE Family Controller Version 10.13.1115.2016" to the boot image. I am using TB16 docking.
Before I choose Task Sequence I am able to ping the management point, and my Disk is listed in DiskPart. However, immediately after I choose Task Sequence I don`t have network anymore, and the task sequence is failing.
Have you verified the task sequence is set to use the same boot image as your booting to?
Also, did you add the WinPE driver cab to the boot image? This contains all of the WinPE thunderbolt drivers as if you're trying to use normal Windows network drivers in WinPE they may not work correctly.