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Mailbox Moved from Exchange 2003 to Exchange 2007 May Be Shown as Linked Mailbox

Microsoft Exchange Server 2007 will reach end of support on April 11, 2017. To stay supported, you will need to upgrade. For more information, see Resources to help you upgrade your Office 2007 servers and clients.


This topic provides information about how to troubleshoot a user mailbox that appears as a linked mailbox in the Exchange Management Console.

This issue can occur if the associated external account was set on the user's Microsoft Exchange Server 2003 or Exchange 2000 Server mailbox.


To resolve the problem, modify the user account attribute msExchRecipientTypeDetails from a value of 2 to a value of 1.

Before You Begin

To perform this procedure, the account you use must be delegated the following:

  • Membership in the local Administrators group

For more information about permissions, delegating roles, and the rights that are required to administer Exchange Server 2007, see Permission Considerations.

Active Directory Service Interfaces (ADSI) Edit can be run from a client computer or server. The computer does not have to be a member of a domain, but the user must have the rights to view and edit the Active Directory directory service domain to which the user is connecting. For more information about how to use ADSI Edit, see Adsiedit Overview.


If you use ADSI Edit or any other Lightweight Directory Access Protocol (LDAP) version 3 client, and you incorrectly modify the attributes of Active Directory objects, serious problems may occur. These problems may require you to reinstall Windows Server 2003, Exchange 2007, or both Windows Server 2003 and Exchange 2007. Microsoft cannot guarantee that problems that occur if you incorrectly modify Active Directory object attributes can be solved. Modify these attributes at your own risk.


To use ADSI Edit to modify the user account attribute msExchRecipientTypeDetails

  1. Install ADSI Edit.

  2. Launch ADSI Edit. Click Start, click Run, type adsiedit.msc in the text box, and then click OK.

  3. Locate the msExchRecipientTypeDetails attribute for the Exchange 2003 or Exchange 2000 server.

  4. Modify the value of 2 to a value of 1.

  5. Click OK, and then close ADSI Edit.