Manager of a distribution list with hidden membership cannot view group members in Exchange 2000 Server

You may not be able to view the group membership of a distribution list that you manage when you use the Microsoft Outlook client to make changes to the distribution list.

This behavior may occur if all the following conditions are true:

• You create a Microsoft Exchange 2000 Server distribution list, or you migrate a user who is an owner of a distribution list from Microsoft Exchange Server 5.5 to Exchange 2000.
• You hide the distribution list membership by using the Exchange Task Wizard, or you set the hideDLMembership attribute by using a tool such as ADSI Edit.

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.
The English version of this hotfix 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 Exchange 2000 Server Service Pack 3 (SP3). For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

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

This problem may occur with the following Microsoft Windows 2000 Server groups:

• Global security group.
• Universal security group.
• Universal distribution group.
• Domain local distribution group.

After you apply this hotfix, if you hide the membership of a distribution list, the distribution list manager can see the members in Microsoft Outlook.

For distribution lists with hidden membership that existed before you applied this hotfix, you must unhide and then hide the distribution group membership before the list manager can see the group members.

To unhide and then hide the membership of a distribution list, follow these steps.

Note You do not have to follow these steps with distribution lists that you hid the membership of after you applied the hotfix.

1. Start Active Directory Users and Computers.
2. Right-click the distribution list that you want, and then click Exchange Tasks.
3. Click Next, click Unhide Membership, and then click Next.
4. Click Next, and then click Finish.
5. Right-click the distribution list that you selected in step 2, and then click Exchange Tasks.
6. Click Next, click Hide Membership, and then click Next.
7. Click Next, and then click Finish.