Topic Last Modified: 2010-01-21

This topic explains how to use the ADModify.NET tool from CodePlex to modify user ExchangeLegacyDN attributes. You can do this to resolve problems that affect Free/Busy data and System Attendant mail flow.

When you moved all the users from an earlier version of Microsoft Exchange to Microsoft Exchange Server 2007, you may also have removed the original Exchange Server 2003 or Exchange 2000 Server Administrative groups.

Microsoft recommends against removing the original Administrative groups from an Exchange organization.

If any of the original Exchange 2003 or Exchange 2000 Administrative groups were removed, you may experience all the following symptoms:

This issue occurs when the ExchangeLegacyDN attributes of the affected user accounts point to a deleted Administrative group. In this scenario, you must update the ExchangeLegacyDN attribute for each affected user. The ExchangeLegacyDN attribute must be updated to the following conditions:

You can use a bulk modification tool, such as LDIFDE or ADModify.NET to perform this operation. For detailed instructions about how to modify the ExchangeLegacyDN attribute, see step 5 under "To remove the last Exchange 2003 or Exchange 2000 server from an Exchange 2007 organization" in How to Remove the Last Legacy Exchange Server from an OrganizationHow to Remove the Last Legacy Exchange Server from an Organization.

For More Information

For more information about how to use ADModify.NET, see the following Microsoft Web log (blog): ADModify.NET is here.

The content of each blog and its URL are subject to change without notice.