Explanation
Duplicate is enabled, and the duplication detection window is set to 10 minutes. The second M3 message in the queue will be discarded.
Note 1: Duplicate detection enables the sender resend the same message, and the queue or topic discards any duplicate copies.
Note 2: Queues offer First In, First Out (FIFO) message delivery to one or more competing consumers. That is, receivers typically receive and process messages in the order in which they were added to the queue, and only one message consumer receives and processes each message.
References:
https://docs.microsoft.com/en-us/azure/service-bus-messaging/service-bus-queues-topics-subscriptions
https://docs.microsoft.com/en-us/azure/service-bus-messaging/duplicate-detection