Hi everyone,
If your status has changed into schedule interview and have not received any invitation emails, please contact the admission office. This happened to me, I waited for more than a week, and then received an email saying that if I don't schedule an appointment within 24 hours, I would miss my interview chance.
FYI, I applied for the one year MBA, with fee and GRE/GMAT waiver. I applied on January 5th, and my status changed into schedule interview two weeks ago. International student (top U.S. graduate program).