Microsoft KB Archive/819019

= IIS Admin Service Repeatedly Stops on an Exchange 2000 Server =

Article ID: 819019

Article Last Modified on 10/26/2006

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APPLIES TO


 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Exchange 2000 Server Standard Edition

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SYMPTOMS
On a Windows 2000-based server where Exchange 2000 is installed or where the Simple Mail Transport Protocol (SMTP) service is configured, the IIS Admin Service repeatedly stops (crashes). You can restart the service successfully, but it stops again after a short period of time (about 5 minutes).



CAUSE
This problem occurs because of an access violation in the Mailmsg object (part of the SMTP service). The Mailmsg object stops responding (crashes) because of a stack overflow that is caused by a corrupted message that cannot be processed.

When messages are received by the SMTP service, they are stored in the NTFS file system. During message processing, the message properties (for example, the From, To, Subject, IP Address, and Number of Recipients properties) are submitted as a set of Mailmsg properties that are then exposed to subsequent SMTP event sinks. The problem that is described in this article occurs when corruption is introduced in the message stream that causes the Mailmsg object internal structure size to be incorrect. This causes a stack overflow. Depending on the extent of the corruption, the stack may be overwritten, and then it stops responding (crash).



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 Windows 2000 Service Pack 2 (SP2) or later must be installed on your computer before you install this hotfix. For additional information about how to obtain the latest Windows 2000 service pack, click the following article number to view the article in the Microsoft Knowledge Base:

260910 How to Obtain the Latest Windows 2000 Service Pack

Restart Requirement
This hotfix automatically restarts the IIS Admin Service.

Hotfix Replacement Information
This hotfix does not replace any other hotfixes.

File Information
The English version of this fix 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 -- 11-Jun-2003 19:30  5.0.2195.6654     322,320  Aqueue.dll 11-Jun-2003 19:30  5.0.2195.6739      67,856  Mailmsg.dll 11-Jun-2003 19:30  5.0.2195.6662      38,672  Ntfsdrv.dll 11-Jun-2003 19:30  5.0.2195.6747     444,688  Smtpsvc.dll



WORKAROUND
To work around this problem, remove the corrupted message from the NTFS or from the Exchange Messaging Database (MDB). For information about how to locate and remove the corrupted message from the NTFS or the MDB, contact Microsoft Product Support Services (PSS). For information about how to contact Microsoft PSS, visit the following Microsoft Web site:

http://support.microsoft.com



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.



MORE INFORMATION
When the messages are received by the SMTP service, they are stored in the NTFS. However, if the message is received from the Exchange Information Store service (Store.exe), the physical message may reside in the Messaging Database (MDB). The problem described in this article occurs because of NTFS file corruption or MDB file corruption. For additional information about how hotfix packages are named, click the following article number to view the article in the Microsoft Knowledge Base:

816915 New Naming Schema for Microsoft Windows Hotfix Packages

Additional query words: AV

Keywords: kbhotfixserver kbqfe kbbug kbfix kbqfe kbwin2000presp5fix KB819019

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