You are developing a sales application with multiple Azure cloud services for orders, billing, payments, inventory, and shipping. The services must asynchronously exchange transaction information in XML format. Which Azure service should you recommend to support this asynchronous messaging?

Azure Service Bus is the correct choice because it is a fully managed enterprise integration message broker that supports asynchronous messaging between decoupled applications. It is designed for reliable and secure delivery of messages, including transactional messaging, and can handle various message formats like XML. Azure Data Lake is for big data analytics, not message brokering. Azure Traffic Manager is a DNS-based traffic load balancer, not a messaging service. Azure Notification Hubs is for sending push notifications to mobile devices, not for general enterprise application integration and asynchronous transaction exchange.