To deploy an MCS image to Azure, you decide to use the Azure connector in App Layering. This produces a virtual disk that is primed to run through Windows Setup. You attach it to a VM, power it on, and find that Windows Setup never completes. If you look at the console screen shot in the debugging page in Azure, you see an image like this:
That is a black screen that says Getting Ready, with a CMD (command prompt) window titled ERROR HANDLER, at the path C:Windowssystem32oobe. This means Windows Setup failed. You can download the VHD and open it up to read Windowssetupact.log, Windowspanthersetupact.log, WindowslogsCBScbs.log, but that won’t help too much.