Hello,
Yes, it is possible to convert the Symantec Endpoint Protection Small Business Edition 12.1 to Symantec Endpoint Protection Small Business Edition 2013
Q. Will current Endpoint Protection Small Business Edition customers be entitled to the new solution?
A. Endpoint Protection Small Business Edition customers can upgrade to Symantec Endpoint Protection Small Business Edition 2013 for up to 30 percent discount off MSRP. Please speak to your reseller for details.
Q. What about customers who are receiving Endpoint Protection through Symantec Protection Suite Small Business Edition?
A. Symantec Protection Suite Small Business Edition will only continue to be bundled with Symantec Endpoint Protection Small Business Edition 12.1.x. There is no automatic entitlement to Symantec Endpoint Protection Small Business Edition 2013.
Check the FAQ's Section of Symantec Endpoint Protection.cloud
http://www.symanteccloud.com/en/gb/services/end_user_protection/endpoint_protection.aspx
Hope that helps!!