Microsoft KB Archive/830592

= An access violation occurs when a user accesses an Exchange 5.5 public folder by using an ASP page =

Article ID: 830592

Article Last Modified on 10/26/2006

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APPLIES TO


 * Microsoft Exchange Server 5.5 Standard Edition

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SYMPTOMS
When many users use an ASP page to view messages that are stored in a public folder on a computer that is running Microsoft Exchange Server 5.5, an access violation may occur on the Exchange 5.5 server. This problem occurs when the ASP page is hosted on a Web server that is running Microsoft Internet Information Services.



CAUSE
This problem may occur if a call is made from the ASP page to a Component Object Model (COM) DLL, and that COM DLL makes multi-threaded calls to the Collaboration Data Objects (CDO) rendering library (Cdohtml.dll). This problem occurs because the CDOHTML!CMimeMap component of the Cdohtml.dll rendering library does not support multi-threaded calls. Therefore, the heap corruption occurs in Internet Information Services.



Hotfix information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/default.aspx?scid=fh;[LN;CNTACTMS]

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites
Microsoft Exchange 5.5 Server Service Pack 4 must be installed before you apply this hotfix.

Restart requirement
You must restart your computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

File information
The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.

Date        Time   Version           Size     File name -- 29-Nov-2003 07:16  5.5.2657.80       803,600  Cdo.dll 29-Nov-2003 05:16  5.5.2657.80       537,360  Cdohtml.dll 15-Nov-2002 01:41  6.5.6582.0         57,344  Htmlsnif.dll 15-Nov-2002 01:41  6.5.6582.0        225,280  Safehtml.dll



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section of this article.



MORE INFORMATION
For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

817903 XADM: New naming schema for Exchange Server software update packages

Additional query words: ASP IIS active server page

Keywords: kbhotfixserver kbqfe kbbug kbfix kbqfe KB830592

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