You do not receive any results when you try to use CDOEX in an event sink application in Exchange 2000 Server or in Exchange Server 2003

You do not receive any results when you try to use Collaboration Data Objects for Exchange (CDOEX) in an event sink application in Microsoft Exchange 2000 Server or Microsoft Exchange Server 2003. This behavior occurs when you try to retrieve the recipient list from a message that has both internal and external Simple Mail Transfer Protocol (SMTP) recipients.

Exchange Server 2003

Service pack information

To resolve this problem, obtain the latest service pack for Microsoft Exchange Server 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

Exchange 2000 Server

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Restart requirement

Warning If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

You must add a registry entry that is named Return All Address Types in Registry Editor, and then must restart your SMTP service after you apply this software update. To add the Return All Address Types registry entry, follow these steps:

1. Click Start, click Run, type Regedt32.exe, and then click OK.
2. Locate the following registry key:
   HKEY_LOCAL_MACHINE\System\CurrentControlset\Services\SMTPSvc\Parameters
3. Click the Edit menu, point to New, and then click DWORD Value.
4. In the details pane, input Return All Address Types.
5. Right-click Return All Address Types, and then click Modify.
6. In the Edit DWORD Value dialog box, click Decimal, type 1 in the Value Data box, and then click OK.
7. Quit Registry Editor.

File information

The English version of this fix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
Note Because of file dependencies, this update requires Microsoft Exchange 2000 Server Service Pack 3 (SP3). For more information, click the following article number to view the article in the Microsoft Knowledge Base:

Microsoft has confirmed that this is a problem in Microsoft Exchange 2000 Server.
This problem was first corrected in Microsoft Exchange Server 2003 Service Pack 2.