At OpenChange, we work on offering a portable Open Source implementation of Microsoft Exchange Server and Exchange Protocols. During the past 10 years, we have seen the community growing but not the number of developers. The conclusions were clear. The price to pay to develop on OpenChange was too high: C language only, very complex, too much knowledge required, too much time before you get visible results. We have addressed all these obstacles and will teach you during this talk how to set up the development environment in no time, understand the basics of the OpenChange REST API and leverage its resources and samples to get first visible results in Outlook today.