LOCKUNTIL?

Hi,

I am trying to develop a real time system which utilizes a Service Bus. I have a Trigger on a Service Bus Queue which takes each message and fires off an Azure Function. Please see my attachment. My question is that they processing between messages is much slower than what I need. What does the LockUntil do and how can I configure this? OR is this a property of the Trigger which fired with each message?

Thanks so much!
Mike

Mike Kiser