If she booked through Orbitz, she would have received a hotel confirmation number - It's normally 6 digits starting with a letter. Go to
MDE and log in. Once logged in click on My Reservations and Tickets. Click on Link Resort Reservation and then she can enter her hotel confirmation number she received from Orbitz. If she has Park tickets, she can link them in there too under the Link Tickets tab. Then she can go to the Magicbands tab and do her Magicbands. Not sure if they will still ship them being that May 19th is less than 30 days away. But they should be able to have them at the front desk for her when she checks in. I hope this helps!