You want to know how to configure Messaging Gateway (SMG) to obtain virus definitions from an internal host running LiveUpdate Administration Utility (LUAU).
You also need to know how to configure Liveupdate Administration Utility (LUAU) to retrieve defintions for SMG.
How to configure SMG:
To obtain virus definition updates from a LAN host
How to configure LUA utility:
After you have properly configured your internal LiveUpdate server, make sure you select to download the proper antivirus definitions type by following these steps:
Refer to the LiveUpdate Administrator's Guide for more information about how to set up a LAN host.