Microsoft KB Archive/104818

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PC Forms: Message Class Not Preserved When Forwarding

Article ID: 104818

Article Last Modified on 10/30/2006


  • Microsoft Exchange Electronic Forms Designer 5.0, when used with:
    • Microsoft Mail for PC Networks 3.0
    • Microsoft Mail for PC Networks 3.2

This article was previously published under Q104818


When a message created with version 1.0 of Microsoft Electronic Forms Designer is forwarded from a version 3.0, 3.0b, or 3.2 Microsoft Mail for Windows user who does not have E-Forms installed, the message arrives as a text message with the following error message:

Displaying this message correctly requires a custom E-Form that is not available, or is incorrectly installed. Please contact your network administrator for more information.


The message class is not preserved when a message is forwarded from a Windows client that does not have E-Forms installed and that does not understand the message class.

To the client that forwarded the message, the E-Form is a message of unknown class. Mail converts the message to a standard note so the Windows client cannot delete class-specific information from the message. Deleting the message class definition causes the above error when the forwarded message is read.


Microsoft has confirmed this to be a problem in versions 3.0, 3.0b, and 3.2 of Microsoft Mail for Windows. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

Additional query words: 1.00 PC Win

Keywords: KB104818