Microsoft Windows NT 4.0 Guide Instrukcja Użytkownika Pobierz pdf (Strona 127)

Microsoft

Windows Server

™

2003 White Paper

Windows NT 4.0 Server Upgrade Guide 122

Exchange Server

More than just e-mail, Exchange has become a crucial system in most companies and the

backbone of many communications infrastructures. In many organizations, the Exchange 5.5

messaging infrastructure performs adequately; however, the software running the messaging

infrastructure is nearing the end of its product life cycle. Organizations looking to upgrade from

Exchange Server 5.5 in a Windows NT 4.0 environment have been given an opportunity to

upgrade with relative ease to both Windows Server 2003 and Exchange Server 2003. Microsoft is

providing new and improved tools for both Windows upgrades and Exchange upgrades. These

tools and the backward compatibility offered in these new products are designed to help ease the

task of upgrading.

This section analyzes the feasibility of upgrading the current Exchange 5.5 e-mail infrastructure to

Exchange 2003.

Note Exchange is an electronic mail server product, not to be confused with Microsoft Outlook

, an

electronic mail client.

Exchange 2000 and Exchange 2003 Considerations

Exchange 2003 is intended as an incremental upgrade to Exchange 2000 with most of the focus

on added features and not major architecture changes. The release of Exchange 2003 closely

follows the release of Windows Server 2003. This means that by the end of 2003, there will be two

upgrade paths for organizations using Exchange 5.5. Exchange 5.5 implementations can either be

upgraded to Exchange 2000 or to Exchange 2003.

With the upcoming end to the Exchange 5.5 product life cycle, many organizations face the same

question: Do we upgrade to Exchange 2000 or skip Exchange 2000 in favor of Exchange 2003?

Many factors can play a role in a decision of this magnitude. Hardware availability and cost,

availability of upgrade tools, feature improvements, and reliability are just a few of the other

factors that need to be addressed.

Product Life Cycle Considerations

Exchange 2003 offers all the improvements of Exchange 2000 plus many added improvements

and the benefit of a full five-year life cycle. Also, Exchange 2003 does not require any more

hardware than Exchange 2000 so the decision to upgrade to Exchange 2003 should not cost any

more than an upgrade to Exchange 2000. Exchange 2003 also offers a full array of deployment

tools to help ease the upgrade process from either Exchange 5.5 or Exchange 2000. In contrast,

the tools offered by Exchange 2000 are minimal and lack documentation.

An understanding of Microsoft product life spans can also be helpful in this decision-making

process. Microsoft products typically have a five-year life span. After five years, an earlier version

is no longer supported. This means that Microsoft Technical Support Services is only minimally

available for end-of-life-cycle products, and service packs or hot-fixes are no longer developed for

newly discovered software problems. As 2003 ends, Microsoft will provide minimal support for

Exchange 5.5.

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