You may experience unexpected behavior in a Windows XP-based computer when you try to access public folders on Exchange 2000 Server (889086)

CAUSE

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.

RESOLUTION

Hotfix information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft Exchange 2000 Server service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

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

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:

301378 How to obtain the latest Exchange 2000 Server service pack

Additionally, this hotfix requires the information that is in the following Microsoft Knowledge Base article:

870540 Availability of the August 2004 Exchange 2000 Server post-Service Pack 3 update rollup

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.

   Date         Time   Version       Size       File name
   -------------------------------------------------------
   27-Dec-2004  07:22  6.0.6617.34   2,338,816  Mdbmsg.dll       
   27-Dec-2004  06:41  6.0.6617.34   4,452,352  Store.exe

MORE INFORMATION

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:

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