There may not be any available Messaging Database taskpool threads if the Store process stops responding in Exchange Server SP1

If the Store process in Microsoft Exchange Server 2003 Service Pack 1 (SP1) stops responding (hangs), there may not be any available Messaging Database taskpool threads.

Hotfix information

A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:

Prerequisites

Because of file dependencies, this update requires Microsoft Exchange 2003 Service Pack 1 (SP1).

Restart requirement

You do not have to restart your computer after you apply this hotfix. However, all the following services are automatically stopped and then restarted when you apply this hotfix:

�	Microsoft Exchange MTA Stacks
�	Microsoft Exchange Information Store
�	Microsoft Exchange System Attendant
�	Intersite Messaging License Logging
�	World Wide Web Publishing Service
�	Simple Mail Transfer Protocol (SMTP)
�	Microsoft Exchange Routing Engine
�	Microsoft Exchange POP3
�	Network News Transfer Protocol (NNTP)
�	Microsoft Exchange IMAP4
�	IIS Admin Service
�	Microsoft Exchange Management
�	Windows Management Instrumentation
�	Microsoft Search

Hotfix replacement information

This hotfix does not replace any other software updates.

File information

The English version of this hotfix has the file attributes (or later file attributes) 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
   -------------------------------------------------------
   25-Aug-2005  02:29  6.5.7233.45     133,632  Drviis.dll       
   25-Aug-2005  03:03  6.5.7233.45     398,336  Exsmtp.dll 
 

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

For more information, click the following article number to view the article in the Microsoft Knowledge Base: For more information, click the following article number to view the article in the Microsoft Knowledge Base: