How to subscribe Windows Azure Platform MSDN Premium?
Note that you will not see Windows Azure Platform MSDN Premium subscription listed in the list of available subscriptions on the Microsoft Online Customer Portal (MOCP) portal. The procedure to get your Windows Azure Platform MSDN Premium subscription is as follows:
Go to MSDN Benefits page. In the right top corner, in the MSDN Subscriptions box click the link Sign up now (see below). This link will take you to the MSDN Subscriptions My Account page and you should log in using the Live ID of the MSDN subscription holder.
On the MSDN Subscriptions My Account page locate a section Windows Azure Platform As shown below and click the link Windows Azure Platform. This link takes you to the Microsoft Online Customer Portal (MOCP) using the Live ID you are logged in (MSDN subscriber)
the MOCP page you can now see that the Shopping Cart contains Windows Azure Platform MSDN Premium subscription. Review the Agreement for this subscription, mark the check box confirming you realize that the variable charges that will apply if you exceed subscription limits and proceed to Check Out to purchase this subscription. You will need the credit card to complete the purchase.