Flyaway, I was told by the agent at ATT that handles the Marriott points that it takes anywhere from 60-90 days, but look for credits to be posted a lot quicker in the future. She told me it used to take up to 120 days. I didn't mind, since she was very courteous and willing and able to answer each one of my questions, a departure from the rude and unprofessional service I received from MCI.