When you send a Lotus Notes user an updated meeting request in Exchange 2000 or in Exchange Server 2003, the Lotus Notes user may receive an "An error occurred while saving: Database already contains a document with this ID (UNID)" error message

Consider the following scenario. You are using Microsoft Exchange 2000 Server or Microsoft Exchange Server 2003. You send a meeting request to a Lotus Notes user. The Lotus Notes user accepts the meeting request and sends you a response. Then, you modify the meeting item. You send an updated meeting request to the Lotus Notes user. The Lotus Notes user tries to accept the updated meeting request. In this scenario, the Lotus Notes user may receive the following error message:

This problem occurs because of a limitation with Microsoft Exchange Lotus Notes Connector.

To work around this problem, delete the original meeting item. Then, send a new meeting request to the Lotus Notes user.

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

Microsoft continues to update the tools that support interoperability among Lotus Domino R5 and Lotus Domino 6, Microsoft Exchange Server 2003, and Microsoft Windows Server 2003 Active Directory. The updated tools for Lotus Domino replace the following tools that are included with Exchange Server 2003 and with Microsoft Exchange Server 2003 Service Pack 2:

• Exchange Connector for Lotus Notes
• Calendar Connector for Lotus Notes
• Migration Wizard for Lotus Notes

To obtain these tools and to obtain guidance and additional resources, visit the following Microsoft Web site: These updated tools provide additional functionality and address several issues that customers reported with earlier versions of the tools.