B2B access AVD

Is there a DOC stating how to setup, enable and access  this feature? (https://azure.microsoft.com/en-us/blog/azure-virtual-desktop-the-desktop-and-app-virtualization-platform-for-the-hybrid-workplace/)

I have deployed a AAD joined MS host pool in Validation, and I have invited a user and granted user IAM as Virtual Desktop User, but how do I access it? When using the Remote Desktop Client I don't have any resources assigned, same goes for the html5.