Is it possible to build and manage an ePO server in a non Internet connected environment? If yes, then is it possible to check in packages after going to a network with internet access downloading them from McAfee and physically moving the packages to the non internet connected environment?
I am assuming all the licences have been purchased to access the various products.
You can download products and patches from you McAfee downloads page on a PC and move them to the offline ePO server to check in.
You can download VirusScan dat files specifically used for checking into ePO from the page below to your PC and them move them to the offline ePO server to check in and your clients will update from that.
It would be a pain doing this on a daily basis though, sometimes multiple update in one day. If the server is on the same network as a client with internet access you could automate it but if its on a fully disconnected/ seperate network it could be tricky.