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Planning to Move from Mixed Mode Exchange 5.5 and Exchange 2000 to Exchange 2003

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If both Exchange 5.5 and Exchange 2000 already coexist, Active Directory® directory service is already implemented and supporting Exchange. Active Directory Connector is running to keep the Exchange 5.5 Directory and Active Directory synchronized.

In this case, you have the following options for deploying Exchange 2003:

  • Upgrade one of the Exchange 2000 servers to Exchange 2003.

  • Deploy a new Exchange 2003 server

Exchange 2000 Components Not Supported in Exchange 2003

It is important to understand that not all components of Exchange 2000 are supported in Exchange 2003. If you currently use any of the components in the following table, you may need to keep an Exchange 2000 server in your organization.

You need to remove any unsupported components before attempting an upgrade because they are not supported in Exchange 2003.

Components that must be removed before upgrading an Exchange 2000 server to Exchange 2003

Component

Resolution

Microsoft Mobile Information Server Exchange Event Source.

Use Exchange Mobile Browse

Instant Messaging Server

Retain an Exchange 2000 server to run this component

Microsoft Exchange 2000 Chat Service

Retain an Exchange 2000 server to run this component

Microsoft Exchange 2000 Conferencing Server

Retain an Exchange 2000 server to run this component

Use Microsoft Live Communication Server

Key Management Service

Retain an Exchange 2000 server to run this component

Use Windows Server 2003

Microsoft Exchange Connector for Lotus cc:Mail

Retain an Exchange 2000 server to run this component

Microsoft Exchange MS Mail Connector

Retain an Exchange 2000 server to run this component

You should also check third-party services that depend on or interoperate with Exchange 2000 to ensure that they are supported with Exchange 2003.

Other services that could be affected include things like:

  • Back up systems

  • Antivirus applications

  • Connectors (such as fax connectors)

ADC Requirements

You must first upgrade all instances of ADC to the Exchange 2003 version of ADC. In addition, you should verify that your connection agreements are set up properly. To do this, use the ADC Tools supplied with Exchange 2003.

Important

When you run the ADC Tools, they examine your directory configuration and make recommendations for connection agreements. To prevent directory replication problems, it is strongly recommended that you accept the recommendations provided.

How it Works

After you upgrade all instances of ADC and run ADC Tools, you install the first Exchange 2003 server. You can either install a server on separate hardware or perform an inplace upgrade on one of your existing Microsoft Exchange 2000 servers.

For More Information

For more information about how to upgrade from Exchange 2000, see the following resources: