The DSProxy service does not direct an Outlook client to the global catalog servers that you want to use in Exchange Server 2003 (912584)

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 Server 2003 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

You must have Exchange Server 2003 SP2 installed to apply this hotfix.

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

836993 How to obtain the latest service packs for Exchange Server 2003

Restart requirement

You do not have to restart the computer after you apply this hotfix.

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.

File name	File version	File size	Date	Time	Platform
Dsproxy.dll	6.5.7651.5	62,976	17-Feb-2006	06:25	x86

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.

Installation information

After you apply this hotfix, you must configure the RFR Prefer In-Site GCs registry entry. To do this, follow these steps:

Click Start, click Run, type regedit, and then click OK.
Locate and then click the following registry subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeSA\Parameters
Right-click Parameters, point to New, and then click DWORD Value.
Type RFR Prefer In-Site GCs, and then press ENTER.
Right-click RFR Prefer In-Site GCs, and then click Modify.
In the Value Data box, type 1, and then click OK.

MORE INFORMATION

Typically, Exchange Server 2003 servers refer Microsoft Office Outlook 2003, Microsoft Outlook 2002, and Microsoft Outlook 2000 client computers to global catalog servers for directory access. If you are running a version of Exchange Server 2003 that is earlier than Exchange Server 2003 SP2, Outlook client computers are referred to global catalog servers that are located in the same site as the Exchange server on which the users' mailboxes are located.

When a user account is in a different domain than the Exchange server on which the user account's mailbox is located, the Outlook client is referred to the global catalog server in the Exchange server domain. In this scenario, the Outlook client receives only read access to the global catalog server. Therefore, the Outlook user cannot configure a delegate or any public distribution lists that the Outlook user owns.

After you install Exchange Server 2003 SP2, the Exchange server refers Outlook clients to global catalog servers in the user's local domain. Therefore, the issue in which Outlook users receive only read access to the global catalog server is resolved.

In an environment in which many user mailboxes are located on Exchange servers in other domains, you may experience a significant change in the load on the global catalog servers in the users' local domain. This change in load occurs because referrals that were originally targeted to global catalog servers in the Exchange servers' domains are now all targeted to global catalog servers in the users' local domain. Therefore, the global catalog servers in the users' local domain may not be able to handle the additional load that is caused by the Outlook directory search requests.

For more information about Directory Service Proxy, visit the following Microsoft Web site:

http://www.microsoft.com/technet/prodtechnol/exchange/guides/E2k3TechRef/b7f8fbf4-732c-4a87-a9d5-3c4c375e5948.mspx

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

824684 Description of the standard terminology that is used to describe Microsoft software updates