Hi Pascal, The logged feature request is exactly for finding the original resource of the dragged appointment. Currently if the appointment has multiple resource assigned, you cannot find from which resource the drag and drop operation has started.
You did not understand what I try to do : I did not have any problem to get the destination resource. What I really need to get is the origin resource. In my example, I want to move the selected appointment from the resource “BONNIN Laurence” to the resource “DUGAST Dominique”. By this way, I want to replace via drag&drop the resource “BONNIN Laurence” to the resource “DUGAST Dominique”. The resource “CORFMAT Françoise” is also a resource of the selected appointment. So what I need is to get the resource from which I start the drag& drop.