I need to add a way to prevent new item creation on a chosen day, after this day has been somehow selected. We use a calendar for Resource Booking. The approver wants to be able to "close" a day when he knows for this particular day there are no other resources available.
My first idea was to create an all-day event called "Day is closed" on this day and check before the approval workflow starts if there is such an event on this day, but unfortunately I cannot search for this event on this day in a WF.
Any idea how I can achieve this? Thank you in advance!