Data Center Security: Server v6.5

Can someone explain to me how the Virus Definitions get updated in Data Center Security: Server v6.5. If there is no Liveupdate option how do I go about configuring it to update automatically? I've looked at all the Install & Configuration Docs I can find but still can't see how this works. It's DCS 6.5 we're implementing not DCS Advanced 6.5.

Thanks in advance for any help.