Hi pesospesos,
Thanks for your post.
Is there any error prompt for your issue?
I’m not sure it's a bug for remote desktop services in TP3 since I haven't found such related statement from the Microsoft.
And for testing out remote desktop services in TP3. I suggest you could follow the articles below.
Remote Desktop Services in Windows Server 2016 Technical Preview 3
http://blogs.msdn.com/b/rds/archive/2015/08/19/remote-desktop-services-in-windows-server-2016-technical-preview-3.aspx
Release Notes: Important Issues in Windows Server 2016 Technical Preview
https://technet.microsoft.com/en-us/library/dn765470.aspx?f=255&MSPPError=-2147217396
Best Regards,
Mary Dong
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