This is related to camel-azure-servicebus component.
The Azure serviceBus Java SDK has a feature allows sender to send ApplicationProperties (Map<String,Object), which may be used for passing metadata associated with the ServiceBusReceivedMessage, during Service Bus operations.
This feature is not present in Camel ServiceBusProducer. It sends only the camel Message body to service bus. There is not a feature to pass meta data such as ApplicationProperties.