List of regions contacted during operation in the order that they were contacted. If there is more than one region listed, it indicates that the operation was performed on multiple regions i.e. cross-regional call.
Example
["North Central US", "Australia East", "Australia Southeast"]
List of regions contacted during operation in the order that they were contacted. If there is more than one region listed, it indicates that the operation was performed on multiple regions i.e. cross-regional call.