In MDT: "Update Deployment Share"

copy the d:\deploymentshare\boot\LiteTouchPE_x64.wim to d:\MDTofflineDefenderx64.wim

md d:\offline

Dism /Mount-Image /ImageFile:D:\MDTofflinedefenderx64.wim /index:1 /MountDir:d:\offline

Unzip Microsoft Security Client.zip

copy Microsoft Security Client to D:\offline\Program Files

Download and Unzip Unattend.zip 
copy unattend.xml to d:\offline (overwite existing file)

Download the latest Virus Defs from here: (note if the client has network connectivy they can upload inside the WinPE boot)

http://go.microsoft.com/fwlink/?LinkID=121721&clcid=0x409&arch=x64

Make sure the file is called: "mpam-fex64.exe"

Copy mpam-fex64.exe to D:\Offline\Program Files\Microsoft Security Client 
Copy mpam-fex64.exe to D:\Offline


Dism /Unmount-Image /MountDir:C:\test\offline /commit

Add .WIM to WDS Boot Images