Recently we had the case that a guest booked for 1 person, but two persons appeared for check-in. Not a big issue: the guest agreed that we send him a reservation change request.
BUT: It is not possible anymore to change the number of guest after the booking has started. You can change the dates and the price, but not the guest number.
I asked the support to do it for us – but even he confirmed that he has no possibility to change the guest number.
Please bring back the option to change the guest number after the booking has started! I can remember the good days, when it was still possible.