It can be a brand new server or an existent one running on Microsoft Azure, after a restart, the VM shows up as running on the portal, but for some reason you can’t access it. Does it sound familiar? Before getting into panic mode, use the Boot Diagnostics and you will have a clear idea what is going on behind the scenes.
Using Microsoft Azure there a simple solution to see what is going on. Open the VM from the portal, click on Boot Diagnostics and we will see a picture of the boot process, in my case the machine was applying patches and getting ready, so just matter of time to get the machine up and running.
If your customer is not on your side, not a problem, just click on Screenshot and a .bmp of that screenshot will be downloaded. You have the option to refresh to track what is going on the server.