Customers can now buy Azure consumption services through the MPSA paying for what they use quarterly in arrears, rather than making an upfront monetary commitment as EA customers do.

Later in the year, on 1st September, customers will also be able to buy the Enterprise Cloud Suite (currently only available through the EA) and to purchase certain Online Services subscriptions in one, two or three year durations – all with price protection.

Get the background in this Microsoft blog post: http://bit.ly/1V2eThL.