Microsoft KB Archive/253306

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XCLN: Old cc:Mail Mailbox Receives Mail After Migration to Exchange Server

Article ID: 253306

Article Last Modified on 10/28/2006


  • Microsoft Exchange Server 5.0 Standard Edition
  • Microsoft Exchange Server 5.5 Standard Edition

This article was previously published under Q253306


When you use the Migration Wizard to migrate all users from cc:Mail to Microsoft Exchange Server, the cc:Mail mailboxes remain in the cc:Mail post office. When a cc:Mail user sends a message to a user whose mailbox has been migrated, the message goes to the cc:Mail mailbox instead of to the mailbox on Exchange Server.


This behavior is by design.


The Migration Wizard does not remove mailboxes and their contents from the cc:Mail system but copies them to Exchange Server and creates a mailbox for the migrated recipient. When the migration is complete, custom recipients that are associated with the cc:Mail mailbox for the same user are deleted. The new Exchange mailbox now has two cc:Mail addresses:

  • The primary address, displayed in bold formatting, is the user's Exchange Server address in cc:Mail format.
  • The secondary address is the user's old cc:Mail address.

This allows mail addressed to the user from an outdated personal address book to be successfully delivered.

To allow for recovery in case of a migration failure, the cc:Mail address for the user is not deleted from the mail directory. No changes are made to the cc:Mail data, and the old mailbox is not deleted from the cc:Mail post office.

After you confirm that the mailboxes are migrated successfully, manually remove or delete the user from the cc:Mail post office. During the next directory synchronization cycle, dirsync reports that a new Exchange user is created. Then Import.exe creates an entry for the migrated user in the cc:Mail directory, and mail is now delivered to the new Exchange Server mailbox.

Keywords: kbprb KB253306