Specifically for Azure VM. What is the recommended way to upgrade from Server 2012 VM to Server 2012 R2 on the same VM?
I prefer not to have to create a new 2012 R2 VM and really rather upgrade my existing Server 2012 as I have installed different software on it and configurations.
This question was also asked last year per http://social.msdn.microsoft.com/Forums/windowsazure/en-US/15e8a17d-0004-4337-a74d-1aa47df4e92d/server-2012-r2-upgrade?forum=WAVirtualMachinesforWindows and remains unanswered.