This section lists the set of mailbox servers that compose the Hosted Exchange solution. The following table shows the reference architecture for Exchange 2007 SP1 servers.

Table: Reference Architecture for Hosted Exchange Servers

Computer Name Role Zone

EXCAS01

Exchange 2007 SP1 Client Access Server

2

EXCASOAB01

Exchange 2007 SP1 OAB Web Distribution Server

2

EXHUB01

Exchange 2007 SP1 Hub Transport Server

2

EXHUBEXT01

Exchange 2007 SP1 Internet-facing Exchange Hub Transport Server (Forefront)

1

EXMBX01-NODE1

Exchange Mailbox Server with CCR Replication, active node

3

EXMBX01-NODE2

Exchange Mailbox Server with CCR Replication, passive node

3

EXMBXOAB01

Exchange 2007 SP1 Public Folder OAB Server

3

EXUM01

Exchange 2007 SP1 Unified Messaging Server

2

Note:
You cannot use Local Continuous Replication or Clustered Continuous Replication servers to store Public Folder databases. This includes any servers that host an Offline Address Book.