A VDA Add-on for Microsoft 365 E3/E5 is added to page 57 of the March 2020 Product Terms

This Subscription Licence allows Microsoft 365 E3/E5 users to access a Windows Enterprise Virtual Desktop Infrastructure on dedicated servers when the users don’t have a primary device with a Qualifying Operating System – for example, users whose primary device is a thin client or a Mac. Note that these licences are only available to customers buying through an Enterprise Agreement.

Find the current Product Terms document here: http://bit.ly/MSproductterms.