Hi Everyone,
Thank you for your input!
1) Are this Clients - Managed?? - Yes, the clients are managed clients, including the one not updating automatically.
2) If Unmanaged, Is the Liveupdate configured from Local Machine? - Not applicable as all clients are managed
3) What happens when you click on START > Run > luall.exe - The client will connect to an internal LU and start downloading the updates fine.
Could you go to the Control Panel, Click on Symantec Liveupdate and Click on Express Mode and Check both the Boxes for Express Mode Settings. - Client is already on express mode with both boxes checked.