Hello,
I would suggest you to check these Articles:
How to export/import an existing Symantec Endpoint Protection Manager policy
http://www.symantec.com/docs/TECH106486
How to Export and Import a Symantec Endpoint Protection client policy
http://www.symantec.com/docs/TECH190053
Before importing a policy, make sure the source computer's version of Symantec Endpoint Protection matches the computer's version you are importing to.
Note: You can migrate the source computer to a newer version before exporting the policy to avoid this problem.
Reference: http://www.symantec.com/docs/TECH163090
Hope that helps!!