You are designing a sales application made of multiple Azure services that handle orders, billing, payments, inventory, and shipping. The services must asynchronously exchange XML-based transaction messages. Which Azure offering should you include in your recommendation?

Azure Service Bus is the correct choice because it is a fully managed enterprise integration message broker that can decouple applications and services. It supports asynchronous messaging, which is crucial for the scenario described, and can handle XML-based messages. Azure Data Lake is a big data analytics solution, not a message broker. Azure Application Gateway is a web traffic load balancer, not a messaging service. Azure Notification Hubs is designed for sending push notifications to mobile devices, not for general enterprise application integration messaging.