Hi, did you ever get this figured out?  I opened a case with Dell on this recently as I"m struggling with the same issue.  It doesn't matter if I use the cctk.exe or generate the exe using the Command Configure tool.  Either way, the boot order ends up messed up after imaging with no apparent way to clear it out and keep it set the way I need it.  

Yes I did.

Hade to make a script that looped the setting to find the network uefi ID.

Using the cctk.exe for it. I disable IPV6 as a part of the script too.

Script:

.\cctk.exe bootorder --bootlisttype=uefi >.\uefi.txt

foreach($line in Get-Content .\uefi.txt) {
if($line -match "Onboard NIC.IPV6."){
$uefi2 = $line -split " " -match "uefi\."
.\cctk.exe bootorder --bootlisttype=uefi --disabledevice=$uefi2
}
if($line -match "Onboard NIC.IPV4."){
$uefi = $line -split " " -match "uefi\."
.\cctk.exe bootorder --bootlisttype=uefi --sequence=$uefi
}
}

I do this as last task in the task sequence.

Hello !

I'm really interested in your solution, but i'm having issues..

root@dell-r640:~# /opt/dell/dcc/cctk  bootorder --activebootlist=uefi
This Option not supported on this machine.
root@dell-r640:~# /opt/dell/dcc/cctk  bootorder --activebootlist=legacy
This Option not supported on this machine.
root@dell-r640:~# /opt/dell/dcc/cctk  bootorder --bootlisttype=legacy
This Option not supported on this machine.
root@dell-r640:~# /opt/dell/dcc/cctk  bootorder --bootlisttype=uefi
This Option not supported on this machine.

Any idea ?