Simply, I have an Azure corporate subscription. I have a co-administrator who has his own personal 90-day trial subscription. When the co-administrator uses the new preview portal (manage.windowsazure.com) he can see their personal subscription (where he is admin) but cannot select or view the corporate subscription (where he is co-administrator).
Any ideas? We want to have multiple people within our company assigned as co-administrators so they can play with the preview features (Virtual Machines, Azure Web Sites, Media Services).