When you send an e-mail message to a distribution list in Microsoft Office Outlook 2003, the e-mail message is sent as expected. However, you may receive the following error message: Additionally, you may receive the following error message when you try to update the distribution list:

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This problem may occur if the following conditions are true:

•	The distribution list contains members of an Internet directory service. Note An Internet directory service connects to a lightweight directory access protocol (LDAP) server to verify e-mail addresses.
•	A member in the distribution list has been moved to a different organizational unit.

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This problem was first fixed in a hotfix that is now contained in a service pack. If you installed the latest Office 2003 service pack, you do not have to install the hotfix.

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Service pack information

This problem is corrected in Office 2003 Service Pack 3. To resolve this problem, obtain the latest service pack for Office 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

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Hotfix information

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How to obtain the hotfix

This issue is fixed in the Outlook 2003 post-Service Pack 2 Hotfix Package that is dated December 6, 2005. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

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Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

This problem was first corrected in Office 2003 Service Pack 3.

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