Applies to: Exchange Server 2007 SP3, Exchange Server
2007 SP2, Exchange Server 2007 SP1, Exchange Server 2007
Topic Last Modified: 2007-06-06
Microsoft Exchange Server 2007 introduces a variety of new concepts and definitions. This topic provides a brief introduction to many of these concepts.
One of the primary new concepts introduced in Exchange 2007 is that of server roles. Instead of one generic installation of Exchange Server, you can now choose from several different roles. These roles are designed to logically group the features that are required to accomplish a set of tasks. The Exchange 2007 server roles are as follows:
- Mailbox The Mailbox server role is
responsible for hosting mailbox and public folder databases. A
mailbox database contains the users' mailboxes.
- Client Access The Client Access server
role enables mailbox access through
Microsoft Office Outlook Web Access, Post
Office Protocol version 3 (POP3), Internet Message Access Protocol
version 4rev1 (IMAP4), Outlook Anywhere (formerly known as RPC over
HTTP), and Exchange Server ActiveSync.
- Hub Transport The Hub Transport server
role handles routing by using Microsoft Active Directory
sites and site topology. The Hub Transport server also applies
policies to incoming and outgoing mail.
- Unified Messaging Unified Messaging
(UM) combines voice messaging, fax, and e-mail messaging into a
single messaging infrastructure that can be accessed from a
telephone and a computer.
- Edge Transport The Edge Transport
server role provides antivirus and anti-spam protection in a
perimeter network for the Exchange organization.
Exchange Management Shell
Exchange 2007 introduces a new management tool for administrators. The Exchange Management Shell is a command-line interface that resembles other command-line interfaces, such as the Microsoft Windows Script Host. Administrators can manage every aspect of Exchange 2007, from creating new e-mail accounts to disabling a user's mobile device.
Two Exchange 2007 features use continuous replication. Asynchronous replication technology is used to create a copy of a storage group and keep the copy current through log shipping and replay. Through continuous replication, the log files of a production database are applied to a copy of that database. The two Exchange 2007 features that use this technology are local continuous replication (LCR) and cluster continuous replication (CCR).
- Local continuous replication LCR lowers
the total cost of ownership for Exchange 2007 by reducing
the number of regular backups that are required for data
protection. LCR does not eliminate the need to create
backups, because data backups are important if a disaster
strikes. However, it does significantly reduce the need to create
regular, daily backups. LCR provides fast recovery with current
data, and also a single-server solution for copying and replaying
- Cluster continuous replication CCR
combines automatic management of redundancy and data replication at
the application level. CCR can be deployed without a single point
of failure in a single data center or between two data centers.
Transaction log replication is used to copy the databases and keep
data current among cluster nodes. The scheduled outage
functionality in CCR is designed to make sure that all log data on
the active node is successfully copied to the passive node.
Therefore, scheduled outages do not result in loss of data, even
though replication occurs asynchronously.
For More Information
For more information about the concepts in this topic, see the following topics: