This is it:
http://help.symantec.com/bucket/saep/GET_STARTED?locale=EN_US
You can enroll in the cloud portal for a couple additional features.
I HIGHLY recommend you read this first though:
http://help.symantec.com/cs/saep/SAEP/v123362243_v123284638/What-happens-after-you-enroll-a-Symantec-Endpoint-Protection-Manager-domain-into-the-cloud-portal/?locale=EN_US
Make sure you completely understand what you're getting into before enrolling as some features will only be controlled by the cloud portal instead of your on-prem SEPM.