Applies To: Windows 10, Windows 8.1, Windows Server 2012 R2, Windows Server 2016 You can use a Microsoft Remote Desktop client to connect to a remote PC and your work resources from almost anywhere using just about any device.

ClientRemote desktop client for mac

Remmina Remote Desktop Client For Windows

Everyone, here is a link, don't know how 'permanent' it is:
https://rink.hockeyapp.net/apps/5e0c144289a51fca2d3bfa39ce7f2b06/
As I suspected, unless you have a hockeyapp user account, you would never find this, unless you were given the direct URL. In this case, MS was helpful enough to post a direct link via a technet article I found doing a google search.
According to technet article this beta does not have all the features of the release version; one feature that is missing that is mentioned is remote access to resources is not available. i've not tried it out yet, so not sure what else might be missing. Here is the technet article, if the direct link ever changes to the beta, hopefully it will be updated here:
https://blogs.technet.microsoft.com/enterprisemobility/2016/03/30/remote-desktop-client-preview-for-mac-supports-multiple-monitors-and-more/
@donikatz, thanks for pointing us in this direction, and I apologize for using the word 'useless'; frustrating was probably a better word. Peace.