Hello
Sorry to hear you are having difficulty, I am assuming the virtual machines have been set up as per the instructions found here https://learn.microsoft.com/en-us/azure/active-directory/devices/howto-vm-sign-in-azure-ad-windows#troubleshoot-deployment-problems
Further down the page is a whole host of troubleshooting which I would suggest you take a look at first. https://learn.microsoft.com/en-us/azure/active-directory/devices/howto-vm-sign-in-azure-ad-windows#troubleshoot-deployment-problems
kind regards
Alistair