Datasheet

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Chapter 1
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Designing and Planning Messaging Services
Making Up a Server-Placement Plan
After considering all these points, you are ready to pull it all together. Build a table that
consists of the following columns to plan you server placement:
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Server role (Mailbox, CAS, etc.)
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Number of users to be hosted on this server (special for Mailbox servers)
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AD site location
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Number of global catalog servers in AD site
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Domain
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Windows 2003 server role (e.g., member server)
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Exchange Server 2007 server edition (Standard or Enterprise)
Once again, consider the following general rules regarding Exchange server roles when
creating your server-placement plan:
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Hub Transport servers must communicate with global catalog servers. Thus there must be
at least one in its AD site.
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Mailbox servers must be located in the same AD site where Hub Transport servers are
available. All sending of email is done using the Hub Transport server.
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As the Client Access server provides the connectivity point to the Mailbox servers, a Client
Access server must be deployed to the same AD site where Mailbox servers are located.
Every user uses the Client Access server to connect directly to the Mailbox server to retrieve
messages, but sending messages is done through the Hub Transport server.
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Unified Messaging servers must be located in the same AD site with a Hub Transport
server, as they submit messages through this server. The Unified Messaging server should
also be located in a hub site or near the IP/Voice over Internet Protocol (VoIP) gateway
or IP private branch exchange (IP/PBX).
This list will provide you with an overview and start your planning considerations but you
should also consider areas that are covered in the next sections.
Unified Messaging X
Per-user/per-distribution list journaling X
Managed email folders X
Forefront security X
TABLE 1.5 Exchange Server 2007 Client Access Licenses (continued)
Features Standard CAL Enterprise CAL
81461.book Page 22 Wednesday, December 12, 2007 4:49 PM