Exchange Information Store service process consumes 100 percent of the CPU on your Exchange Server 5.5 computer

The Microsoft Exchange Information Store service (sometimes known as Store.exe) process consumes 100 percent of the CPU on your Microsoft Exchange Server 5.5 computer. When this problem occurs, clients cannot connect to the Exchange mail server.

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: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

This hotfix requires Exchange Server 5.5 Service Pack 4 (SP4).

Restart requirement

You must restart the Exchange services 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.

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

For additional information about how hotfix packages are named, click the following article numbers to view the articles in the Microsoft Knowledge Base: