How to PERMANENTLY change the Outlook format back to the Hotmail format?

I know when a person logs into their Hotmail account that it automatically takes you to the new Outlook format. I also know that if a user wants to, they can go to the upper right cog (by the users name) under options and have the option to switch back to Hotmail format. What I want to know is that even when a user does use those options to go back to the Hotmail format, every time they log out & log in at another time, it goes right back to the Outlook format. How can a user PERMANENETLY choose to have the Hotmail format instead of the new Outlook format?