List of Portals used in Azure World
https://preview.portal.azure.com
https://devicemanagement.portal.azure.com
https://www.microsoftazuresponsorships.com
https://account.azure.com/Subscriptions
Formerly https://app.vssps.visualstudio.com
https://manage.windowsazure.com
https://account.activedirectory.windowsazure.com/usermanagement/multifactorverification.aspx
Now redirects to https://www.office.com
https://portal.office.com/commerce/manage.aspx?empty=1
Redirects to https://account.activedirectory.windowsazure.com/r#/applications
https://app.powerbi.com/admin-portal/
https://manage.visualstudio.com