Datasheet

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Chapter 1
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Designing and Planning Messaging Services
2007 Unified Messaging, one or both of the following can be used to connect the telephony
network infrastructure to your data network infrastructure:
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IP/PBX (a single device)
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PBX (legacy) and an IP/VoIP gateway (two separate devices)
Of course, depending on the size of your organization, you might include additional
UM IP Gateways depending on the requirements of your telephony network. You should
talk to your telephony people in your organization to plan how to best implement this
feature for your organization.
A Unified Messaging Deployment Plan
To implement Unified Messaging in your organization, you must follow these common steps:
1. Deploy the Unified Messaging server role: Depending on the size of your organization and
number of users you want to connect using Unified Messaging, you should add the role to an
Exchange server or set up a dedicated Unified Messaging server in your environment.
2. Receive telephone lines or organize channels: Start talking to your telephone people to
receive phone lines that you can organize.
3. Deploy IP/VoIP gateways: Once you receive the information, you can start to deploy
IP/VoIP gateways and add the channels or numbers.
4. Make sure you have the correct Client Access License (CAL) for your users! They need an
Enterprise CAL for using Unified Messaging.
Edge Transport
Another new feature in Exchange Server 2007 is the implementation of a smart host and
SMTP relay version of Exchange Server that is not part of your company’s domain and will
be placed in the perimeter network or directly on the Internet. A smart host is a designated
server through which an email server routes all outgoing messages. Placing previous Exchange
Server implementations outside your company’s firewall was always dangerous: the Active
Directory and Exchange Server needed full access to your company’s network, so any security
threads could have spread into your company easily.
As a solution, most of the Exchange Server implementations that I know about use dedi-
cated smart-relay software, mainly based on Linux operating system. The Edge Transport
server now fills this gap. It uses the Active Directory Application Mode (ADAM) to store con-
figuration and recipient information locally. Thus only information that is needed on the
server is stored there. It handles all Internet-facing mail flow as well as provides protection
against spam and viruses.
Antivirus and Antispam
The Edge Transport server includes some sophisticated agents that help you to prevent mes-
sages that include spam or viruses from entering the organization. They provide different
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