When a reputed top European business school hit the buffers with its existing IT infrastructure, it went â??Back to schoolâ?? itself. What would be the optimum alternative to ESADE's fully virtualized, on-premises architecture? The exam-passing â??Answerâ??: a combination of the best of Microsoft's Azure cloud back end and front end development and collaboration tools and the cream of the open source solutions crop. The school has moved to a complete IaaS back end, with plans for more cloud.