With the release of ITMS 7.6, Communication profiles feature is introduced (See HOWTO110157). The communication profiles feature gives you an overview of the connections that the Symantec Management Agents use to communicate with Notification Servers or site servers. Communication profile defines the information that the Symantec Management Agents require to establish connection to Notification Server or site server.
With the Symantec Agent Communication Profile you can setup the proper Proxy settings for the Symantec Management Agent and Site Servers communication:
Note: you can also setup Proxy Settings for your agents during their initial installation under All Settings > Agents/Plug-Ins > Symantec Management Agent > Settings > Altiris Agent Install