Specifies whether all navigation items or the selected item must be synchronized with the security permissions when an end-user clicks an item.
A SynchronizeItemsWithSecurityMode enumeration value specifying the mode in which to check security permissions for the current user.
When an end-user clicks a navigation item, the ShowNavigationItemController checks whether they has permissions to navigate to and read the data displayed by this item. Dependent on the result, the item is enabled/disabled, if it has been active; or activated, if it has been inactive. You can set how many items must be checked when an end-user clicks an item. Set this property to SelectedItem, if you want only the selected item to be checked. Set this property to AllItems, if you want all items to be checked each time an end-user clicks an item. By default, this property is set to SelectedItem.