How do you design a highly resilient Azure Service Bus architecture for mission-critical systems?

Use geo-disaster recovery, redundancy, retry policies, DLQ, and idempotent consumers to build resilience.

A resilient architecture ensures zero data loss and high availability. Use Premium tier with availability zones, configure geo-disaster recovery with alias failover, implement retries with exponential backoff, and design consumers to be idempotent. Use DLQ for failure isolation and monitoring for proactive alerting. Combine Service Bus with fallback storage like Blob or DB for critical events.