FIX: The original caller is unavailable when a COM+ application that is hosted on a computer that is running Windows Server 2003 is called from a computer that is running Windows 2000

Consider the following scenario. A Microsoft COM+ application is hosted on a computer that is running Microsoft Windows Server 2003. You call the COM+ application from a computer that is running Microsoft Windows 2000. In this scenario, the original caller is unavailable.

This problem occurs because a different version of Microsoft Distributed COM (DCOM) is installed in Windows Server 2003 than in Windows 2000. When DCOM examines the client computer, the necessary data is not returned because the different version in Windows 2000 does not meet the security needs of the DCOM version that is installed in Windows Server 2003.

Service pack information

To resolve this problem, obtain the latest service pack for Windows Server 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

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

You must apply Windows Server 2003 Service Pack 1 (SP1) before you apply this hotfix.

Restart requirement

You must restart the computer 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 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.

Windows Server 2003 for x86-based systems

Windows Server 2003 x64 Edition

Windows Server 2003 for Itanium-based systems

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Windows Server 2003 Service Pack 2.

For more information, click the following article number to view the article in the Microsoft Knowledge Base: For more information about DCOM, visit the following Microsoft Developer Network (MSDN) Web site: