Yes, in most cases you will see it in the software rather than hearing it first from your traveller. When an airline moves a departure time, changes the flight number or cancels a leg, that message normally goes back to the booking record, and we show it as an alert against the booking so you can spot it when you log in. How reliable this is does depend on the supplier the ticket was issued through, so it is worth treating the alert as a help rather than a guarantee.
The honest limit is timing and coverage. Some airlines send the change weeks in advance, others only hours before departure, and a same day disruption caused by weather or a technical problem often never reaches the booking record at all because the airline handles it at the airport. Low cost carriers are the weaker area, since several of them prefer to notify the passenger directly on the contact details given at the time of booking, which means the message can reach your customer before it reaches you.
Seeing the change is not the same as fixing it. The software will show you the new times so you can tell your customer, but accepting the new schedule, reissuing the ticket or claiming a refund follows the airline rules for that fare, and whether you can complete that yourself in the portal or have to raise it with our support team depends on the supplier and on your plan.
Before you go live, ask us which of your flight suppliers pass change messages back into the booking record, and make a habit of checking your upcoming departures list each morning so nothing sits unnoticed.