O domínio se uniu aos clientes Windows Pro sem licença de volume para receber a oferta de atualização?
Domain Joined computers are not supported at this time unfortunately. Your best option is to download the .ISO file and upgrade the computers manually/offline.
How will Domain Joined computers that are not volume license clients be able to check their systems and reserve the Windows 10 upgrade?
You will need to use Enterprise Assessment tools for the range of computers you have. The reservation app does not work in complex IT environments.
Microsoft is likely to release a new version of its Microsoft Assessment and Planning Toolkit (MAP) that will support Windows 10. It can help you quickly inventory small or large IT environments without requiring you to install any agent software in your environment.
Watch this blog for updates to know when it will be available with support for Windows 10.