Microsoft KB Archive/222329

= You receive an error message when you attempt to send e-mail to contact Distribution List members in Outlook 2000 (CW) =

Article ID: 222329

Article Last Modified on 12/10/2004

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APPLIES TO


 * Microsoft Outlook 2000 Standard Edition

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This article was previously published under Q222329



NOTE: The procedures in this article only apply if you have installed Outlook with the Corporate or Workgroup option. With this option, you can use Messaging Application Programming Interface (MAPI) services. To determine your installation type, click About Microsoft Outlook on the Help menu. If you have the Corporate or Workgroup installation, you see "Corporate or Workgroup".



SYMPTOMS
When you attempt to send e-mail to recipients included in a contact Distribution List (DL), you may receive one of the following errors:

The messaging interface has returned an unknown error. If the problem persists, restart Outlook.

-or-

An internal support function returned an error.



CAUSE
There is a duplicate, one-off contact in the DL, containing the Internet address for a member of the Microsoft Exchange Server Global Address List (GAL).



RESOLUTION
Do not use the identical display name for one-off contacts in a DL that also have Internet entries in the GAL.



WORKAROUND
If you need to include a GAL member's Internet address in a contact DL, use a different display name.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.



MORE INFORMATION
A one-off address entry is made in a DL by clicking the Add New button and then adding the recipient and Internet e-mail address without adding the recipient as a contact.

Additional query words: OL2K

Keywords: kberrmsg kbbug kbpending KB222329

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