Invitation Expires At

expiresAt on a ClientInvitation prevents portal access links from remaining valid indefinitely. If a client doesn't accept within the invitation window, the link becomes invalid and a new invitation must be issued. This is a security measure — short expiration windows reduce the risk of an invitation link being used by an unintended recipient. Compliance staff can see expiresAt to determine whether to resend a fresh invitation if the client missed the deadline.