Coexisting with Previous Versions

Managing Exchange in Mixed Mode

When you run your Exchange 2000 organization in mixed mode, Exchange 2000 can interoperate with previous versions of Exchange. To manage your organization in mixed mode, you need to know how to manage Exchange 4.x and 5.x servers. You also need to know how to manage users with mailboxes on previous versions of Exchange. In addition, you need to manage Connection Agreements and merge any duplicate accounts that are created in Active Directory. Finally, you must understand the differences between operating in mixed mode and operating in native mode.

The topics in this section will help you understand the advantages and disadvantages of running your Exchange organization in mixed mode or native mode.

For help with specific tasks, see How To.

For general information, see Concepts.

Answers to Frequently Asked Questions

What is the difference between operating my Exchange organization in mixed mode versus native mode?

You can operate your Exchange 2000 organization in mixed or native mode. Native mode offers full Exchange 2000 functionality, while mixed mode offers interoperability between Exchange 2000 and previous versions of Exchange. When you install Exchange 2000 , your Exchange 2000 organization runs in mixed mode by default.

This default setting ensures future interoperability with previous versions of Exchange (for example, the installation of an Exchange version 5.5 server at a later time), even if no Exchange 5.x servers exist at the time of installation. The concept of mixed-mode and native-mode Exchange organizations is similar to the idea of mixed-mode and native-mode domains in Active Directory. With Exchange 2000, native and mixed mode can be selected only at an organizational level. More...

Do I manage my Exchange 4.x and 5.x mailboxes from Exchange Server Administrator or from Microsoft Windows 2000 Active Directory Users and Computers?

You can manage users with mailboxes on Exchange 4.x and 5.x servers from the Exchange 5.5 Administrator program or from Windows 2000 Active Directory Users and Computers. There are advantages to using Active Directory Users and Computers. More...

Do I manage my Exchange 4.x and 5.x servers from Exchange Server Administrator or from System Manager?

Although the configuration of an Exchange 5.5 organization is synchronized with Windows 2000 Active Directory using a Configuration Connection Agreement, you must administer all 4.x and 5.x servers using Exchange Server Administrator.  More...

What is the difference between public folder or recipient Connection Agreements and Configuration Connection Agreements?

Public folder and recipient Connection Agreements are used to synchronize Active Directory objects between Exchange 2000 Active Directory and the Exchange 5.5 directory. Configuration Connection Agreements are automatically created to synchronize configuration information between Exchange 2000 servers and Exchange 5.5 sites. More...

Related Topics

Understanding Exchange's Modes of Operation Understanding Coexistence with Previous Versions of Exchange