Symantec Anti-Virus Corporate Edition clients controlled via the Symantec System Center Console do not follow the “Download product updates using LiveUpdate” setting.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/49347/symantecOddity.txt
Source: https://packetstormsecurity.com/files/49347/symantecOddity.txt.html