What will happen to the certificates if the Symantec VIP license expires?
Please review this KB article for the Symantec VIP License Subscription (Service End Date) Account Expired Error .
When a VIP account expires, the account will become inactive and VIP Services will no longer function.
If a grace period has been extended and the account goes to an EXPIRED state, VIP services and certs will continue functioning normally while the renewal is in process.
If an inactive account goes back to ACTIVE or EXPIRED status, existing VIP certificates will continue functioning and do not need to be re-issued.