To display warning icons on your unconfirmed events, go to the calendar and look for the settings "gear icon" in the top right hand corner. Then check the "Show confirmation warnings" box and save. 

When an event is unconfirmed a small icon will appear next to the event title. The icon will appear either orange or red depending on whether the client's event is in the "Confirmation" or "Critical confirmation" LifeCycle state. 

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