The multisite association is primarily for the ease of VDC management and monitoring. Considering your use case, you need to integrate a unique VCDA for each VCD instance and replicate the required workloads for failover/migration.
Cheers, Sree | VCIX-5X| VCAP-5X| VExpert 6x|Cisco Certified Specialist Please KUDO helpful posts and mark the thread as solved if answered