Our paper is about the work we performed for Prevas AB in Karlstad. The assignment was to synchronize three different systems calendar functions, so that what?s going into one calendar is visible in all the others. To manage this we needed first to survey how the three systems functioned, which split the work into an examination phase and a construction phase. The examination phase led to us limiting the work to only concern a one-way communication between two of the systems in the construction phase. This construction work is explained in detail in this paper.