The default boot.wim file used to boot the computer into WinPE during the imaging process contains built-in drivers.
However, there may be instances where the boot.wim file does not contain network or storage drivers for specific computer models.
If you encounter problems and see a failure during the imaging process at the Contacting Imaging Server (Installation) Stage or Preparing Disk (Installation) stage. In this scenario, you will need to inject the WinPE drivers for your computer model into the boot.wim file.
This could be done manually using the DISM commands. However, the Deploy Imaging Server (DIS) allows you to quickly inject these WinPE drivers into your boot.wim file.