We are using a shared ooutlook calendar to book events and list them by clicking and dragging the e-mail request,which is also on a shared in-box, detailing the event into the date we want to schedule.

We need a way to indicate, of the four of us, who (just initials willdo) took ownership of an event and scheduled it. I can add a user defined column called initials and show it on the in box but cant figure out how to populate it. I heard that there may be a way a field can be created that is triggered by the drag and drop activity that commits to a scheduled day. This would be ideal if it especially can differentiate each of the four of us.