Cannot AutoJoin Windows Virtual Desktop VM to Azure ADDS

Hi DWhite84 here's a possible suggestion for the domain join problem - are the DNS settings for your VNet pointing at the IP addresses of the AD servers created by ADDS? This wouldn't be done automatically for you. Check that, then create a simple Win10 machine from an image, join it to the same VNet, and see if you can domain join that successfully - if you can't, at least you'll get some useful info as to why it can't. 

For your second question, the shortlink takes you to the old WVD web interface. Try adding ARM into it, e.g. https://rdweb.wvd.microsoft.com/arm/webclient/index.html/webclient/index.html but obviously this will only work once you have resources available to your user account - so you probably need to sort the domain join first.