We are looking at a situation where we will have 3 Exchange 2010 servers in a DAG. Each server will have multiple databases live on it. Each server is a HT.
All servers on a single domain. Multiple physicial locations. A single internet connection shared by all physical locations. The internet entry/exit also has one of the Exchange servers.
Do we need an edge server. If not where and how is the incoming/outgoing email routed.
We use Postini for email filtering. Where do i point this.