Open Software Solutions

Source: Microsoft Support

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When using Exchange 2003 with Outlook 2007, when you click ‘Connect To This Discussion board’ from a SharePoint alert email, you receive the following error:

Outlook Send/Receive Progress
! Task ‘SharePoint’ reported error (0x800401F3) : ‘Unknown Error 0x800401F3′

Certain headers are encoded by SharePoint which Exchange 2003 does not decode. Exchange 2007 does decode these headers and the issue does not occur with Exchange 2007.

Upgrade to Exchange 2007 to resolve this issue.

A fix is being investigated for SharePoint to not encode these headers.

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