For the most part the Edge Transport role of Exchange 2007 requires little configuration. However one of the major configuration items is the Edge Subscription between the Edge server and the Hub Transport server(s).

To create a new Edge subscription configuration file:
New-EdgeSubscription -FileName "C:\EdgeSubscription.xml"

To import the configuration file on a Hub Transport server:
New-EdgeSubscription -FileName "C:\EdgeSbuscription.xml" -CreateInternetSendConnector $true -CreateInboundSendConnector $true -site "Default-First-Site-Name" -Force

To force synchronization:
Start-EdgeSynchronization

Edge Synchronization Frequencies (not configurable)