The Exchange Edge Transport role is responsible for handling mail flow from and to your organization and can be used to secure and filter messages sent to and received from the internet. In addition to routing messages, you can apply rules, configure settings, and enforce limits on messages as they pass through the servers in your environment. Transport agents can be used to provide basic anti-spam protection, and both the roles implement detailed logging capabilities that can be leveraged from the Shell.
The Edge Transport role was reintroduced in Exchange 2013 Service Pack 1 (CU4) and remains part of Exchange 2016's architecture. In this recipe, we will take a look at how to install the Edge Transport role and how to configure the Edge subscription.