@mperriello ok so you are using the post init script to update the unattend.xml file with the system name? I’m trying to understand where its falling down. In the link I provided you there should be a section of the code that calls.

${postdownpath}fog.updateunattend

That line is commented out in the tutorial. Remove the hashtag from in front of that line and it should update your unattend.xml file. You may need to update the code if your unattend.xml file is not found in the standard location.