Welcome to the club!
Generally you need to register your license numbers on the cert at the website listed on the cert. Note you will need to create a Symantec Account using an email address. After registration, the licenses will be tied to this account.
Symantec will email you the actual license keys to enter into the server. Note you must enter a license key for the media server or the keys for your agents will be rejected. The media server on the cert is called Continuous Protection Server .....
Once all the everything is registered, you cannot enter any more trial agents/options