This blog post covers a summary of the session from Paul Collinge and Jeff Mealiffe about a recommended network architecture to get the most out of Office 365.
The enterprise connectivity challenge is that most customers are using a lot of expensive network equipment for the outgoing and incoming network traffic to and from the Internet. For example, proxy servers, WAN accelerator, secure web gateway, intrusion prevention system, etc. All of this network and connectivity equipment is expected because all things outside is unknown and untrusted.
But this model doesn’t fit with the cloud world of Office 365 and causes various connectivity problems.