A Primary Interop Assembly is not available for CDOEXM in Exchange Server 2003

When you create a Microsoft .NET program that uses Collaborative Data Objects for Exchange Management (CDOEXM) to access managed code in Microsoft Exchange Server 2003, you must manually create a Primary Interop Assembly (PIA).

You expect a PIA to be available for CDOEXM to access the managed code through.

To resolve this problem, obtain the latest service pack for Exchange Server 2003 . 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. This problem was first corrected in Exchange Server 2003 Service Pack 1.

For additional information about PIAs, visit the following Microsoft Web site: For additional information about CDOEXM, visit the following Microsoft Web site: