Notes for Exchange 5.5 Administrators

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If you have servers running Exchange 5.5 in your Exchange 2003 organization (that is, your organization is in mixed mode), it is still possible to manage recipients using the Exchange 5.5 Administrator Program, and it is recommended that you do so, with the exception of moving mailboxes. When you move mailboxes, use Exchange 2003 System Manager or Active Directory Users and Computers, where Exchange 2003 System Management tools have been installed.

Note

Before you use Active Directory Users and Computers to move recipients from Exchange 5.5, you must first create a connection agreement between each Exchange 5.5 site and Active Directory. It is strongly recommended that all objects in your Exchange 5.5 directory be represented in Active Directory before you deploy your first Exchange 2003 or Exchange 2000 server. This greatly reduces the risk of future problems. For more information about planning connection agreements, see "Migrating from Exchange Server 5.5 to Exchange Server 2003" in the Exchange Server 2003 Deployment Guide.

Exchange objects in Exchange 2003 are different from the Exchange objects in Exchange 5.5. Make sure that you understand how these objects have changed. The following table associates the Exchange objects in Exchange 5.5 with their equivalents in Exchange 2003.

Terminology differences between Exchange 5.5 and Exchange 2003

Exchange 5.5 term Exchange 2003 equivalent term

Mailbox

Mailbox-enabled user

When a user is mailbox-enabled, the user has an e-mail address and a corresponding mailbox. Mailbox-enabled users can send, receive, and store e-mail messages in an Exchange organization.

Custom recipient

Mail-enabled user

When a user is mail-enabled, they have an associated e-mail address external to the Exchange organization, but they do not have an associated Exchange mailbox. Mail-enabled users can receive messages at a specified external address, but they cannot store messages on Exchange servers in your organization.

—or—

Mail-enabled contact

A mail-enabled contact does not have a Windows logon account or a mailbox. A contact can represent someone outside the Exchange organization, such as a customer or a business partner.

Distribution list

Mail-enabled group

E-mail messages that are sent to a group are routed to the e-mail address of each group member.