10.8.5 What happens to an Item for which a deadline is set when its deadline passes?
An icon indicating that the deadline has passed is displayed in the Outbox. Additionally, the Item information other than the Item name is displayed in red. An Item whose deadline has passed can still be executed.
For details about the Items that are displayed in the Outbox, see 3.3.1 Checking the status of a sent Item in the Administration Guide.