A storage group stops responding on a computer that is running Exchange Server 2003 or Exchange 2000 Server

On a computer that is running Microsoft Exchange Server 2003 or Microsoft Exchange 2000 Server, you may experience the following symptoms:

• A storage group on the Exchange computer stops responding. The storage group stops accepting client logons and client mail requests.
• If you try to dismount a database in the storage group, the database becomes locked and does not dismount.
• If you try to dismount a different database in the storage group after the first database is locked, you cannot do so. To regain functionality of the storage group, you must restart the Exchange computer.

Exchange Server 2003 hotfix information

A supported hotfix is 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 software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if 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. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

To install this hotfix, you must be running Exchange Server 2003 Service Pack 1 (SP1). For more information about how to obtain Exchange Server 2003 Service Pack 1, click the following article number to view the article in the Microsoft Knowledge Base:

Restart requirement

You do not have to restart the computer after you apply this hotfix. However, the following Microsoft Exchange services are automatically stopped and then restarted during the hotfix installation:

• Microsoft Exchange Event
• Microsoft Exchange Information Store

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 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.

Exchange 2000 Server hotfix information

A supported hotfix is 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 software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if 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. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

The hotfix has the following prerequisites:

• You must be running Exchange 2000 Server Service Pack 3. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
  301378� How to obtain the latest Exchange 2000 Server service pack
• You must have the Exchange 2000 Server post-Service Pack 3 update rollup installed. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
  870540� Availability of the August 2004 Exchange 2000 Server post-Service Pack 3 Update Rollup

Restart requirement

You do not have to restart the computer after you apply this hotfix. However, the following Microsoft Exchange services are automatically stopped and then restarted during the hotfix installation:

• Microsoft Exchange POP3
• Microsoft Exchange Event
• Microsoft Exchange IMAP4
• Microsoft Exchange Information Store

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 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.

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