Its not possible from SEPM, Serial number is not stored in DB.
You can use SCCM to get it
hose information needs to be filled by the end user, you need to enable log collection for that.
How do I get the "User Info" tab updated for each user with a managed Symantec Endpoint Protection (SEP) client without a manual edit in the Symantec Endpoint Protection Manager (SEPM)
http://www.symantec.com/business/support/index?pag...
Easiest way I would say is to use wmic
wmic /node:"C:\COMPUTERS.TXT" bios get serialnumber >c:\results.csv