As per the below document, it is saying that "To realize a first-in, first-out (FIFO) guarantee in Service Bus, use sessions" . So if in a queue, we are not enabling the Sessions, we can not access messages in FIFO manner? If yes then in which order messages can be accessed?
Document link :
https://docs.microsoft.com/en-us/azure/service-bus-messaging/service-bus-messaging-overview