Thanks so much. I am just kind of worried because my last qualifying stay will be complete on August 3rd and on August 15th I have a reservation at the Marriott Rennaissance in downtown Chicago and I am really looking forward to an upgrade but I've been reading reports about Marriott being a couple of weeks behind in updating points and status lately.
I'll add my two cents worth. I recently completed the Platinum challenge. When I called customer service on a separate issue, I asked when I would see the change in status. They verified that I had met the requirements and within an hour my status was upgraded. Just to make sure, I'd call as soon as the last stay posts to your account (if your status has not yet been changed).