Hi Benjamin,

if you are corporate customer you may discuss this with your Dell Account manager. Services may be able to add this information to your Configuration Services Asset Report (payable service). Most customers I know, signed up for this service and get this (and other information like GUID, Service-Tag, etc.) in advance. Basically an excel or csv file. So you can prepare anything to smoothly deploy your notebooks, desktops etc.

Another alternative is to capture this information during deployment. There is an Dell Platform Tags Utility that could be run during WinPE or Windows. Download: https://www.dell.com/support/home/us/en/19/drivers/driversdetails?driverId=T3JYG .

This tool can read "Auxiliary MAC address". This MAC address is equal to your Passthrough MAC Address. Not an expert on this but you may be able to build a script to register with your network tools.

the tag utility is what I was looking for as well.

It returns output like this

PlatformTags64W.exe -- Version 4.0.25.1
(C) Copyright 1993-2016 Dell Inc.

Aux Mac Value .... XXXXXXXXXXXX

SUCCESS - Application return code (0x00)

 which you can parse and use.

e.g.

$app = "c:\Dell\Drivers\PlatformTags\PlatformTags64W.exe"
$param = "RAM"

$((& $app $param) -join " ") -match "([A-F0-9]{12})"

$mac = $matches[0]
write-output $mac