Currently it is not possible to set the advanced options for the boot order using the vSphere Client, but you can perform the following steps.
- Remove the VM from Inventory.
- Change the VMX as follows:
[...] bios.bootOrder = "ethernet0,cdrom,hdd" bios.hddOrder = "scsi0:0"
- Reregister the VM on the Host:
vim-cmd solo/registervm /vmfs/volumes/iscsi1/win10-test/win10-test.vmx