When your current license is about to expire, the Symantec Endpoint Protection Manager sends license expiration notifications to the Symantec Endpoint Protection administrator. Symantec highly recommends that you renew your license before it expires.
When you renew a license, the management server removes and replaces the expired license with a new license. To purchase renewal licenses, visit the Symantec Store, or contact your Symantec partner or preferred Symantec reseller.
In the event that you accidentally delete a license, you can recover it from the Symantec Endpoint Protection Manager console.