Have a look here:
Can Symantec Endpoint Protection Manager be monitored by Microsoft Operations Manager (MOM)?
http://www.symantec.com/docs/TECH105164
https://www-secure.symantec.com/connect/forums/microsoft-scom-management-packs-sepm-121-and-11
https://www-secure.symantec.com/connect/forums/symantec-protection-sharepoint-scan-engine-and-scom
There is an idea for enhancement request regarding SCOM as well:
https://www-secure.symantec.com/connect/idea/sep-management-pack-microsoft-scom-system-center-operations-manager