Just got the new Macbook Pro Retina and trying to set up an Exchange account -- the same one I have set up on my iPhone 5. However, on the Macbook Pro, I can open up the Mail app and see some of the messages in the left column (showing the From name, subject, and first line of the message). But when I click on the actual email, it just shows "Loading..." in the right section where the message is supposed to show. It's so weird, because some of the messages show, and then there's some other ones that just shows "Loading..." I've tried a few things such as running updates, rebooting, re-adding the Exchange account, etc. I can't get this issue fixed... Can someone please help?