I searched the internet but only found this
So the actual version if Mirage can handle Windows 10 clients? We will get he first one next week: a DELL laptop that does not have Windows 7 drivers anymore and since we never incorporated Windows 8/8.1 we have to cope with Windows 10 now. It also would make no sense to use it with Windows 7, since it can be converted in a tablet and Windows 7 just is not good for using it that way.
The next question: if it works with Windows 10, can we migrate form a windows 7 laptop to Windows 10?
In the USMT tab the option is missing but the blog post above clearly advertises it...