XWEB: IIS Hangs When User Cancels File Upload from Within Browser

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This article was previously published under Q190361

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SYMPTOMS

When you use Outlook Web Access to send an attachment of a large file (for example, 30 MB), click "Add attachment now", click Close, and then click OK to cancel the task, Internet Information Server (IIS) stops responding (90% to 100% CPU utilization). The file must be large enough, or the link slow enough, that the client can cancel the upload before the whole file is sent up.

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CAUSE

Exupload.dll failed to test that the client had terminated the task and looped infinitely.

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RESOLUTION

To resolve this problem, obtain the latest service pack for Exchange Server version 5.5. For more information, please see the following article in the Microsoft Knowledge Base:

191014 (http://support.microsoft.com/kb/191014/EN-US/ ) XGEN: How to Obtain the Latest Exchange Server 5.5 Service Pack

The English version of this fix should have the following file attributes or later:

Component:

   File Name     Platform  Date     Time    Size
   ----------------------------------------------------
   Exupload.dll (Intel)    5/27/98  10:51a  17,680
   Exupload.dll (Alpha)    5/27/98  10:44a  29,456

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