My scenario is a simple SP list A which contains 2 dates/ time (start and finish) and a person, who is "on call" for that period (usually whole weeks but can vary). When a user creates an item in another list B they give the date of that event and I want to lookup up the on-call staff member based on the event's finish date/ time and add their details to list B. If the event is too far in the future, the on-call staff may not be selected
Any pointers on how to achieve this? TIA