You have configured your managed Mac clients for Symantec Endpoint Protection (SEP) to use custom proxy settings for LiveUpdate through External Communications Settings. After you enable Web Traffic Redirection (WTR) for your Mac clients in the Integrations policy, however, you find that LiveUpdate traffic no longer honors your custom proxy settings. Instead, LiveUpdate attempts a direct connection.
No errors appear in the lux.log, which you can find under Library/Application Support/Symantec/Silo/NFM/LiveUpdate/Logs/. Instead, the proxy information that you expect to see is absent.
To work around this issue, only use custom proxy settings for LiveUpdate for your Mac clients when Web Traffic Redirection is disabled.