There do not appear to be any discussion groups specifically for talking about the top level Azure Portal.
In the Azure Portal I click on the "?" then "Ask the Community" and show all supported products. None of them are specifically for talking about the Azure web-based management console.
Also at the bottom of this post, I cannot select a tag for "azure-portal" or "azure-management"
Very irritating. I have no idea where to go from here.
(also posted this in the "Azure AD" group.)