Microsoft Windows NT 4.0 Guide Bedienungsanleitung PDF herunterladen (Seite 129)

Microsoft

Windows Server

™

2003 White Paper

Windows NT 4.0 Server Upgrade Guide 124

E-mail Infrastructure

Organizations must update their messaging infrastructure to provide the reliability required of a

mission-critical application. In the past, messaging meant e-mail and was regarded as just

another way to communicate—much like telephones, faxes, forms, and written documents are

vehicles for sharing information. Today, it is no longer enough to deliver e-mail messaging and the

Internet to the client. Survival in today's e-business world requires organizations to analyze

changes in the marketplace correctly and respond instantly. A powerful messaging system makes

this possible.

Many organizations currently use Exchange 5.5 server primarily to send and receive mail. If

companies are going to react with speed and intelligence to changing demands of the

marketplace, these companies must bridge barriers of time, distance, and technology to provide

every employee in the organization with real-time access to the information they need. Using

Exchange Server 2003, organizations can take advantage of their messaging infrastructure to

further increase employee productivity with value-added collaborative solutions. Exchange Server

2003 uses a wide range of emerging digital technologies to give the users real-time access to the

information they need—no matter their location.

Exchange Server 2003 is engineered to make use of the power of Windows Server 2003 and

delivers unified management of all messaging, collaboration, and network capabilities, and

resources. The Exchange Server 2003 computing environment offers a low cost of ownership and

also provides improved fault tolerance and scalability designed for large, enterprise environments.

Deploying Exchange Server 2003 helps companies provide their employees with the latest

technological advances in corporate messaging as well as improved backup and recovery.

Microsoft has been running beta versions of Exchange Server 2003 since September 2002 to

thoroughly this product in a production environment. Its reliability has been tested by most

Microsoft employees, who have been using Exchange Server 2003 since the beginning of 2003.

Scalability and Disaster Recovery

Many companies run Exchange servers with very large information stores. Stores of 50 GB and

larger are not uncommon. Exchange 5.5 can handle large information stores, but disaster

recovery of such a large store can be a challenge at best. These Exchange 5.5 servers may

perform well today, but organizations need to consider whether they are equipped to handle a

large, corrupted information store. Exchange Server 2003 enables an organization to break up

that information store into smaller and more manageable stores that still reside on a single server.

For example, in the sample upgrade scenario described in an earlier section, HGF Properties

faced this decision. Their server ran Exchange 5.5, Standard Edition, with a 16-GB information

store limit, and the server currently had a 15.8-GB store. A company in a situation like this

probably shouldn’t wait to upgrade until Exchange Server 2003 ships. The best path is an

immediate upgrade to Exchange 2000 Enterprise Edition.

Exchange Server 2003 provides many reasons to upgrade, but none is more important than its

superior scalability and disaster recovery mechanisms. Consider how much it costs to lose

messaging functionality for one hour, one day, or even a couple of days. Employees dislike even a

15-minute messaging outage. The costs associated with a significant e-mail outage are probably

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