Microsoft Exchange 2000 Manual do Utilizador descarregar pdf (Página 7)

Table 2. Number of mailboxes on each server at various stages of the migration process

Server Before migration After first migration After second

migration

After third migration

ML370-1 1000 0 0 0

ML370-2 1000 1000 0 0

ML370-3 1000 1000 1000 0

Consolidated

server/storage

environment

(DL580G2 and

EVA3000)

0 1000 2000 3000

Best practice method for migration and server consolidation

The test method used for the migration and server consolidation included the following:

• Installing a new Microsoft Exchange 2003 server into an existing Exchange 2000 Administrative

Group

• Using the Exchange 2003 move mailbox wizard to move user mailboxes from the source Exchange

2000 server to the target Exchange 2003 server

• Decommissioning the old Exchange servers

Note

This method is appropriate for a Microsoft Exchange 2000 Server to

Exchange Server 2003 migration only. It is not intended for use when

migrating from Exchange 5.5 or from mixed environments that include

Exchange 5.5 because additional steps and considerations apply that are

not addressed in this paper. For information about upgrading from

Exchange 5.5, refer to

http://www.microsoft.com/technet/prodtechnol/

exchange/2003/upgrade.mspx

The move mailbox method minimizes risk, provides an opportunity for testing and tuning the new

system before putting the new server into production, and provides the benefit of minimal downtime to

the end users. Because the new environment coexists with the old environment for the majority of the

migration and consolidation, if there is a problem during the migration, a simple restore of the pre-

migration databases to the old servers can easily be performed. This overlapping period also

provides the benefit of allowing a burn-in period for the new environment. During this time, load

simulation, performance benchmarking, and performance tuning can be done to optimize the new

environment before it is put into production. Finally, because the move mailbox method only

temporarily interrupts a user’s service during the actual moving of that individual’s mailbox, there is

minimal service interruption for end users, which enables the administrator to keep users online during

the migration process.

It also is not necessary to use other migration tools, such as the Exchange Profile Update tool

(Exprofre.exe) to update client Microsoft Outlook profiles. Outlook profile updates occur automatically

when users log in for the first time after a mailbox move, as long as the old server is online for a

sufficient time that allows all users to log in at least one time after the move. Other Exchange

functionality, such as Outlook Web Access and ActiveSync with pocket PC devices, will also become

available after the update occurs.

Pfmigrate, a utility available in the Exchange CD support tools, may also be used to migrate public

folders before decommissioning the old server. However, during testing, the public folder hierarchy

1 2 3 4 5 6 7 8 9 10 11 12 ... 34 35

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