Switching user profiles to administrator profiles and vice versa, can only be done by the existing administrator(s) of a customer account.
Administrators that want to manage profiles of the users within their tenant, need to log in on http://my.gdaas.com with their account. Once logged in, go to Users.
Please note that this topic is irrelevant for single user subscription accounts. A single user subscription account will automatically be the administrator of his/her customer account.
To discover how to change your subscription, click here.