You may experience unexpected behavior in a Windows XP-based computer when you try to access public folders on Exchange 2000 Server

If you have the Google Desktop search tool loaded on a Microsoft Windows XP-based computer, you may experience the following symptoms when you try to access public folders on Microsoft Exchange 2000 Server:

• You receive a remote procedure call (RPC) request overflow error message.
• The available memory for the computer suddenly decreases.

This issue occurs because thousands of folders open in a short time when you try to access public folders on a Windows XP-based computer that has the Google Desktop search tool loaded. This behavior causes the Exchange 2000 Server public folders to perform at a slower rate than expected.

Additionally, many users use the Google Desktop and Look tools. Because many users use these tools, the public folder server quickly runs out of resources. This behavior causes the public folder server to stop responding.

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.

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, submit a request to 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

Because of file dependencies, this update requires Microsoft Exchange 2000 Server Service Pack 3 (SP3).

For more information, click the following article number to view the article in the Microsoft Knowledge Base: Additionally, this hotfix requires the information that is in the following Microsoft Knowledge Base article:

Hotfix 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.

Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall your operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

After you install this hotfix, you must modify the objtFolder registry key to limit the maximum number of users who can open a MAPI session. To do this, follow these steps:

1. Click Start, click Run, type Regedt32.exe in the Open box, and then click OK.
2. Locate and then click the following registry key:
   HKEY_Local_Machine\SYSTEM\CurrentControlSet\Services\MSExchangeIS\ParametersSystem\MaxObjsPerMapiSession
3. On the Edit menu, point to New, and then click DWORD Value.
4. Type objtFolder, and then press ENTER.
5. Double-click objtFolder, and then click Modify.
6. In Edit DWORD Value, click Decimal under Base.
7. In the Value Data box, type 100, and then click OK.
8. Quit Registry Editor.

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.