You can configure an FQDN address object as a load-balanced FQDN.
    You can 
configure FQDN address objects as load-balanced
                    FQDNs to ensure comprehensive policy matching when application servers
                use load-balanced DNS servers to distribute traffic. When you enable this feature,
                the firewall maintains a complete list of resolved IP addresses for the FQDN, rather
                than replacing the existing list with each DNS response. This addresses situations
                where load-balanced DNS servers return only a subset of available IP addresses in
                response to individual queries, which can cause policy rules to fail when matching
                against IP addresses that were not included in the most recent DNS response.
You configure this functionality by enabling a new checkbox option in the FQDN
                address object configuration. When you designate an FQDN as load-balanced, the DNS
                proxy implements additional query logic to build and maintain the complete set of
                resolved IP addresses. The system adds DNS retry events with progressive timing
                intervals when it receives different IP addresses from those currently stored,
                allowing it to discover the full range of IP addresses associated with the
                load-balanced domain.
You would implement this feature when your network includes applications that rely on
                load-balanced DNS infrastructure where complete visibility into all possible
                destination IP addresses is critical for security policy enforcement. The feature
                ensures that your security policies function correctly, regardless of which subset
                of IP addresses the load-balanced DNS server returns for any individual query. 
The feature maintains backward compatibility with existing FQDN configurations, and
                you can selectively enable load-balanced DNS handling only for specific FQDN address
                objects that require this behavior. The system limits each domain to a maximum of
                100 IP addresses to manage memory usage effectively while supporting the vast
                majority of load-balanced DNS implementations.