What must all features such as Recovery Services vault, storage account, and virtual network have in common when configured for Azure Site Recovery?

When configuring features for Azure Site Recovery, such as Recovery Services vault, storage account, and virtual network, it is essential that they all reside in the same Azure region. This requirement ensures that the site recovery process operates efficiently and minimizes latency.

Having all components in the same region facilitates direct communication between services, which is critical for the seamless replication of data and for maintaining the integrity of the recovery process. If these components were spread across different regions, it could introduce complexities in data transfer, increase costs due to cross-region data transfers, and potentially lead to latency issues that might affect the failover process.

Additionally, keeping all components in the same region simplifies management and configuration as it consolidates resources and outlines a clear geographical boundary for disaster recovery operations. Thus, ensuring all the required features are in the same region is vital for successful implementation and operation of Azure Site Recovery.