Microsoft confirm that from 1 August 2017 organisations licensed with Windows 10 Enterprise E3/E5 or VDA E3/E5 User SLs will be able to install Windows 10 Enterprise Current Branch in a virtual machine running on Microsoft Azure or a shared server with a Qualified Multi Tenant Hosting Partner.

See page 42 of the August 2017 Product Terms and read more here: http://bit.ly/2wwUsli.