Is there a way we can update the virus definition offline?
For eg, download it from the Symc database, pump it to a usb thumb drive and update the client offline.
Some of my client's PC are not connected to the internet.
Yes. Download and run the Intelligent Updater file. Get it here:
https://www.symantec.com/security_response/definitions/download/detail.jsp?gid=sep
Let me know if you have questions.
Will this work for SEP14?
Erm, try the below link for the SEP14 ones:
https://www.symantec.com/security_response/definitions/download/detail.jsp?gid=sep14