To ensure that staff are notified when you assign tasks to them, you will need to enable the “Add to Activity List” option. Tasks will appear on the staff’s activity list however many days, hours, or minutes you specified before the task is due.
Knowledge Base > FAQs > Notes/To-Do’s/Calls > How do I make sure that the staff I am assigning the To-Do or Call to, is notified of it right away?