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

ID: Q190361

The information in this article applies to:

Microsoft Outlook Web Access, version 5.5
Microsoft Internet Information Server version 4.0

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.

CAUSE

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

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:

Q191014 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

STATUS

Microsoft has confirmed this to be a problem in Microsoft Outlook Web Access version 5.5.

Additional query words: iiswww iisgeneral owa

Keywords : exc55sp2fix
Version : WinNT:5.5
Platform : winnt
Issue type : kbbug