Microsoft Windows NT 4.0 Guide Manual de usuario descargar pdf (Pagina 133)

Microsoft

Windows Server

™

2003 White Paper

Windows NT 4.0 Server Upgrade Guide 128

backup strategy in Exchange Server 2003 is much more flexible when using the Volume Shadow

Copy service that only Windows Server 2003 includes. Also, for those organizations that choose

to upgrade to Windows Server 2003, the only choice for e-mail is Exchange Server 2003. For any

organization needing greater operating system flexibility, an upgrade to Exchange Server 2000

may be preferred.

Risk Management

One of the main goals of any upgrade is risk management. To reduce the risks of the upgrade,

the risks must be identified. Does Exchange Server 2003 pose any more risks than Exchange

2000? The short answer is yes, because of the relatively short time that Exchange Server 2003

has been in enterprise production. For this reason, organizations may prefer to upgrade to

Exchange Server 2000 first.

Features Made Obsolete by Upgrading

Several features that existed in Exchange 2000 or Exchange 5.5 have been discontinued in

Exchange 2003 or moved to other product lines. The following features are no longer in Exchange

Server 2003:

• Real-time collaboration features. Exchange 2000 supports numerous real-time collaboration

features such as chat, Instant Messaging, conferencing (using Exchange Conferencing Server),

and multimedia messaging (also known as unified messaging). These features have been

removed from Exchange Server 2003. Microsoft Office Real-Time Communications Server 2003

(RTC Server), previously code-named "Greenwich," is the new enterprise instant messaging (IM)

solution and extensible real-time communications platform from Microsoft, currently under

development. For more information, see the RTC Server

home page on the Microsoft Office Web

site at http://www.microsoft.com/office/preview/rtcserver/default.asp.

• M: drive. In earlier versions, the Exchange information store (which uses the

\\.\BackOfficeStorage\ namespace) is mapped to the M: drive on an Exchange server. The M:

drive mapping provides file system access to the Exchange store. However, in some cases, the

mailbox store can become corrupted from file system operations, such as running a file-level virus

scanner on the M: drive, or by running file backup software on the drive. As a result, the M: drive

is disabled by default in Exchange Server 2003.

• Key Management Service (KMS). Exchange 2000 and Exchange 5.5 include KMS, which works

with Windows 2000 certificate services to create a PKI for performing messaging. With a PKI

infrastructure in place, users can send signed and encrypted messages to each other. KMS in

Exchange 2000 provides a mechanism for enrolling users in advanced security and handles key

archival and recovery functions. Exchange Server 2003 no longer includes KMS. The PKI

included with Windows Server 2003 now handles the key archival and recovery tasks that were

performed by KMS in Exchange 2000.

Upgrade Paths for Exchange Server 2003

When Exchange 2003 is released, you will be able to upgrade from Exchange 5.5 in one of two

ways:

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