In the Email app, hit the button on the top left corner, which is your current account name, and then that gives you a screen where you can add more accounts.
this post nailed it for me. I was able to add a hotmail account (that I dont really use) to test it. Coming from webOS I wish there weren't so many context/screen sensitive menus and sub-menus in android but it is what it is. I'm learning. Thanks