In the Appointment List section of the Appointment Lookup window, the appointments are sorted using the Date/Time column in ascending order by default.
To change the sort, select any column header.
An up arrow icon appears above the column name, indicating that the appointments are now sorted by the selected column in ascending order.
To sort the appointments using the same column in descending order, select the column header again.
A down arrow icon appears above the column name, indicating that the appointments are now sorted by the selected column in descending order.
Note: After you close the Appointment Lookup window and open it again, the appointments are sorted using the Date/Time column in ascending order by default.