offlineServicing
Use the offlineServicing configuration pass to apply unattended Setup settings to an offline Microsoft Windows image. During this configuration pass, you can add language packs, update package, device drivers, or other packages to the offline image.
The offlineServicing configuration pass runs during Windows Setup. Setup extracts and installs the Windows image, and then executes the Deployment Image Servicing and Management (Dism.exe) tool. Packages listed in the <servicing> section and settings in the <offlineServicing> section of the answer file are applied to the offline Windows image.
Additionally, you can use the Deployment Image Servicing and Management tool with an answer file to apply settings in the offlineServicing pass. For more information, see Service a Windows Image Using DISM.