How do you purchase Azure Active Directory Premium?
I have had a trial, which has expired. I get an email saying to go to the Intune (?) portal:
Follow these easy steps to purchase a subscription:
1) Sign in to the Microsoft Intune Account Portal, with your User ID
2) On the Admin page, on the left pane, under Subscriptions, click Manage.
3) Find Microsoft Azure Active Directory Premium trial, and click on it.
4) On the Subscription details page click Buy now.
5) Follow the steps in the purchasing wizard to complete the purchase process.
There is no trial subscription and no way to purchase. There has been some discussion that you require an Enterprise Agreement to purchase it:
http://azure.microsoft.com/en-us/pricing/details/active-directory/