For users comfortable with modifying launcher configurations, the Epic Games Launcher includes a hidden "PCB Mode" (Pre-Cached Binaries Mode) that can simplify offline deployments:
You can now launch the engine by running Engine\Binaries\Win64\UE4Editor.exe . Method 2: Downloading Source Code from GitHub (Advanced) Unreal Engine 4 Download Offline Installer
To access these tools, you typically need to visit the or Enterprise portals, where MSI installers and deployment scripts are provided for IT professionals. Essential Requirements for UE4 Offline Unreal Engine 4 Download Offline Installer