Melbourne is 7 hours ahead of Cairo
Best overlap: 8:00 AM to 11:00 AM in Cairo is 3:00 PM to 6:00 PM in Melbourne.
If you set up a recurring sync, 8:00 AM to 11:00 AM in Cairo (3:00 PM to 6:00 PM in Melbourne) is the natural home for it. With 3 hours of overlap, 8:00 AM in Cairo (3:00 PM in Melbourne) is a comfortable, repeatable slot for both sides.