To configure the Scan Engine to use the liveupdate.conf file because the customer has a proxy server that they use to connect to the Internet, this is what is necessary to be present in the liveupdate.conf file.
Browse to the directory where the liveupdate.conf file exist.
Note: Where <IP address> replace it with the IP address of the proxy server. Where <Port Number> replace it with Port Number that the proxy server uses. Now if the proxy server uses a username or password then fill it in. If it does not then 'proxyusername' and 'proxypassword' can be omitted.