Add #Azure Users through the Azure portal?

I know that as a CloudBank User I add team members to an Azure subscription through the CloudBank portal, as described by this topic. However I have a non-CloudBank case where I need to add an Azure User. What is the procedure in this case?

This page shows how to give your students or other colleagues access to your Azure Subscription. You can make your students Admins or Contributors, the difference being whether they will have IAM permissions. Contributors can do anything but IAM.

Reminder: When you are working with Azure through CloudBank do not use the above method. Instead use the CloudBank portal for this task.