Exchange 2013-2019 Planning Diagrams - Part 1: Overview

I'm starting a small series on Exchange 2013-2019 planning where I've created some Visio diagrams/drawings that lay out how I'm designing a environment. I know that a lot of Exchange admins don't have time to create drawings for a visual representation to show to (non-tech) upper management, so feel free to grab these and edit them to match your organization.

Exchange 2013-2019 Planning Overview

The first drawing I'm presenting is the overview of the Exchange environment.

We'll be standing up two (2) datacenters in separate sites, with a 3rd site/datacenter for the DAG Fileshare Witness; all connected by MPLS.
Each main datacenter will house three (3) Multirole Exchange 2013 servers, configured in a 6-node DAG. We will have SPAM filtering, Load Balancers (LB's), and Reverse Proxies in a DMZ in each location. You can use your LB's as Reverse Proxies if they support it, which most newer ones do.

First, you'll want to download the newest Exchange 2013/Office 365/Lync 2013 Visio stencils from Microsoft so the shapes will render correctly.
Once you have those saved, stick them in C:\Users\Your User\Documents\My Shapes.

Then, hop over to my Google Drive and grab the Exchange 2013 Planning Overview.vsdx

Here's a pic of the diagram if you want to cook up your own with a guide: