That course is sponsored and paid for by member states or institutions like the PPC. The United Nations puts together a list of potential SRSGs—heads of mission, force commanders, police commissioners, heads of country teams—and brings them together for a two-week period to work together in decision-making. They learn how the UN system works and what a mission looks like. We have been involved in those training activities several times now.
On May 25th, 2010. See this statement in context.