A.You should consider having the ImportEdgeConfig.ps1 script run on the existing Exchange Server 2010 server.
B.You should consider having TCP port 88 and TCP port 3268 opened on the firewall between the perimeter network and the internal network.
C.You should consider having the new server joined to an Active Directory domain.
D.You should consider having the Active Directory Lightweight Directory Services installed on the new server in the perimeter network.