Check the box in the LiveUpdate Settings policy to enable LiveUpdate scheduling.
To enable LiveUpdate Scheduling:
Once the clients check in with SEPM and receive the updated policy, the LiveUpdate schedule should appear enabled.
On the client computer, you can verify the state of the LiveUpdate schedule using Terminal by entering the following command from within the SEP installation directory:
sudo ./sav liveupdate -v
By default, the directory is /opt/Symantec/Symantec_antivirus (which is case-sensitive).
For additional command-line reference, see Symantec Endpoint Protection 12.1.5 for Linux Client Guide under Related Articles.