Sorry for the late reply.
Yes, your suggestion seems work for us. But i still have another questions:
I checked the Sesmlu.log inside "C:\Program Files\Symantec\Symantec Endpoint Protection Manager\tomcat\logs", i found that the update always have following error on around 2:20-2:30am(This is the Hong Kong time zone which equal to your time zone 18:00pm)
08/25 02:35:26 [1f24:1f94] ERROR spcVirDef64 ProductUtil Initialize Tomcat server xml file failed.
It seems live update always met this error and keep on re-try the process until more than one hour later (around 3:40am) to start the normal update process again. It take too long time for we can affortable. Can i fix this?
Thanks for help.