Editing Sysprep Unattend.xml after Sysprep
Solution 1:
The unattend.xml file may be in either of:
C:\Windows\Panther\C:\Windows\Panther\unattend\
inside the image.
Solution 2:
- Mount the sysprep'd image as a VHD on a VM or if it's captured as a WIM them mount the WIM to a newly created empty directory
- Navigate to
C:\Windows\Pantherand update the XML file in-place - Dismount the WIM file and save allowing it to be used again or else edit the XML file on the VHD directly allowing over-write
This would resolve your issue.