Here's the text of a message I received at approx 2:30 PM CDT:


Thank you for your email regarding the inability to access your online account.

We sincerely apologize for any inconvenience this technical issue may have caused you. Our corporate technical support department has been working diligently to solve this issue. This technical issue has prevented most guests being able to access their online account for the past 24 hours. We are happy to say that access to your online Marriott Rewards account has been restored! Please feel free to logon at: https://marriott.com/signIn.mi

If for some reason you are still having technical difficulties, please don't hesitate to reply to this message or click on the "contact us" link in the top right hand corner of the Marriott.com website.

Thank you for choosing Marriott!

Marriott Rewards Customer Service