It says on Qatar Airways website that you need to re-confirm your flight ast least 72 hours prior your departure.
Yes, Qatar Airways requires our passengers to re-confirm their reservations at least 72 hours prior to departure."
Do you also need to re-confirm your first leg? I am booked on a round trip flight with Qatar Airways to Bangkok later this year. Would I need to re-confirm LHR-BKK as well BKK-LHR?