Did I understood it right that in Windows Azure Queue storage a message can live for 7 days maximum?
What happens with the message after 7 days?
What happens with the message if you read it once during the 7 days and you don't delete it? I mean you read the message from the queue and set the visibility timeout to let's say 1 minute. What happens after you have read the message (without deleting it) and the 1 minutes timeout visibility expires? I know is back and available on the queue but what happens with the 7 days TTL of that message, is it renewed to 7 days from that point or is 7 days totally since message was created?
Yes, you understood it correctly. Messages from queues are deleted automatically within 7 days time and there is nothing called 're-newed'. Once inserted into the queue storage, it will be deleted automatically and there is no way you can recover it back(there are no recovery tools either).