Hi Tomoki,
- You should be able to log into the Azure Win10 Client using the local admin you create during the vm creation process and use the MAK key you are using for your physical boxes.
- If you have a site to site connection from virtual network gateway or some sort of NVA in Azure to your on premise infrastructure, then I believe you should be able to do the same validation as on prem.
- I am honestly not too sure on this as I havent done much with MDT. This link is a bit older but may point you in the right direction: https://learn.microsoft.com/en-us/answers/questions/590440/how-to-setup-mdt-environment-on-azure
- Yes, This I have done and it works well. Here is a great link explaining the process: https://learn.microsoft.com/en-us/azure/devtest-labs/devtest-lab-create-template
Let me know if I can elaborate on anything else. Best of luck!
Patrick