Folks,
Don't take this as a bash.....
Unfortunately there has been little to no real information about what people are running to get to their enterprise email and apps.
Sorry, but I haven't had a problem and the company I work for has security that we charge premiums for.
My guess (and I really mean this as a guess) is that most of the problems communicated here are about not having a standard VPN security configuration. In fact, several people are talking about hitting a port for email that can't be done through a VPN. If you aren't running through a VPN, then shame on your company!