The Site to Zone Assignment List policy prevents Internet Explorer from using other zone configuration settings when the Internet Explorer Enhanced Security Configuration feature is enabled on a Windows Server 2003 SP1-based computer

On a Microsoft Windows Server 2003 Service Pack 1 (SP1)-based computer, the Microsoft Internet Explorer zone configuration settings do not work as expected. This occurs when the following conditions are true:

• The Internet Explorer Enhanced Security Configuration feature is enabled.
• The Site to Zone Assignment List policy is configured.

Under these conditions, the Site to Zone Assignment List policy prevents Internet Explorer from using zone settings that are configured through Internet Explorer Maintenance or through the Security tab in Internet Options.

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

No prerequisites are required.

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 item in Control Panel.

Windows Server 2003, x86-based versions

Windows Server 2003, Itanium-based versions

Windows Server 2003, x64-based versions

Registry settings 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 the hotfix, you have to modify registry settings to enable the hotfix. You can modify the registry settings for a specific user or for all the users.

Registry settings for a specific user

You can use one of the following methods to enable the hotfix for a specific user.

Method 1

Follow these steps, and then quit Registry Editor:

1. Click Start, click Run, type regedit, and then click OK.
2. Locate and then click the following key in the registry:
   HKEY_CURRENT_USER\SOFTWARE\Policies\Microsoft\Internet Explorer\Main\FeatureControl
3. On the Edit menu, point to New, and then click Key.
4. Type FEATURE_IGNORE_POLICIES_ZONEMAP_IF_ESC_ENABLED_KB918915, and then press ENTER.
5. On the Edit menu, point to New, and then click String Value.
6. Type *, and then press ENTER.
7. On the Edit menu, click Modify.
8. Type 1, and then click OK.

Method 2
Follow these steps, and then quit Registry Editor:

1. Click Start, click Run, type regedit, and then click OK.
2. Locate and then click the following key in the registry:
   HKEY_CURRENT_USER\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl
3. On the Edit menu, point to New, and then click Key.
4. Type FEATURE_IGNORE_POLICIES_ZONEMAP_IF_ESC_ENABLED_KB918915, and then press ENTER.
5. On the Edit menu, point to New, and then click DWORD Value.
6. Type *, and then press ENTER.
7. On the Edit menu, click Modify.
8. Type 1, and then click OK.

Registry settings for all users

You can use one of the following methods to enable the hotfix for all users.

Method 1

Follow these steps, and then quit Registry Editor:

1. Click Start, click Run, type regedit, and then click OK.
2. Locate and then click the following key in the registry:
   HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Internet Explorer\Main\FeatureContro
3. On the Edit menu, point to New, and then click Key.
4. Type FEATURE_IGNORE_POLICIES_ZONEMAP_IF_ESC_ENABLED_KB918915, and then press ENTER.
5. On the Edit menu, point to New, and then click String Value.
6. Type *, and then press ENTER.
7. On the Edit menu, click Modify.
8. Type 1, and then click OK.

Method 2
Follow these steps, and then quit Registry Editor:

1. Click Start, click Run, type regedit, and then click OK.
2. Locate and then click the following key in the registry:
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl
3. On the Edit menu, point to New, and then click Key.
4. Type FEATURE_IGNORE_POLICIES_ZONEMAP_IF_ESC_ENABLED_KB918915, and then press ENTER.
5. On the Edit menu, point to New, and then click DWORD Value.
6. Type *, and then press ENTER.
7. On the Edit menu, click Modify.
8. Type 1, and then click OK.

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 Microsoft Windows Server 2003 Service Pack 2.

Typically, when Internet Explorer uses the Enhanced Security Configuration feature on a Windows Server 2003 Service Pack 1 (SP1)-based computer, Internet Explorer is designed to ignore the zone settings that are configured through the Site to Zone Assignment List policy. Internet Explorer must only use the zone settings that are configured through Internet Explorer Maintenance or through the Security tab in Internet Options. For more information, visit the following Microsoft Web site: For more information about security zones in Internet Explorer 6, click the following article number to view the article in the Microsoft Knowledge Base: For more information about the standard terminology that is used to describe Microsoft software updates, click the following article number to view the article in the Microsoft Knowledge Base:

Technical support for x64-based versions of Microsoft Windows

Your hardware manufacturer provides technical support and assistance for x64-based versions of Windows. Your hardware manufacturer provides support because an x64-based version of Windows was included with your hardware. Your hardware manufacturer might have customized the installation of Windows with unique components. Unique components might include specific device drivers or might include optional settings to maximize the performance of the hardware. Microsoft will provide reasonable-effort assistance if you need technical help with your x64-based version of Windows. However, you might have to contact your manufacturer directly. Your manufacturer is best qualified to support the software that your manufacturer installed on the hardware.

For product information about Microsoft Windows XP Professional x64 Edition, visit the following Microsoft Web site: For product information about x64-based versions of Microsoft Windows Server 2003, visit the following Microsoft Web site: