The following features, when enabled, impact all Internet services. Internet Information Services (IIS) prompts the Internet services to restart before the changes can take effect.

Enable Direct Metabase Edit

This feature is also known as edit-while-running. Select this option to change metabase property values while IIS is running. Changes take effect immediately. You can implement changes to the metabase using common text-editing tools like Notepad. You must be an administrator of the computer running IIS to enable and use this feature.


To use edit-while-running, the metabase history feature must be enabled. The metabase history feature is enabled by default.

UTF-8 Logging

IIS 6.0 supports writing log files for Web sites in UTF-8, instead of just ASCII (or local code page). IIS 6.0 does not support UTF-8 logging for FTP sites. When enabled, all Web sites on your IIS server begin logging in UTF-8. If UTF-8 is not selected, IIS logs in the Local Character Set.

MIME Types (Global Level)

Multipurpose Internet Mail Extensions (MIME) are mappings that set the various file types that IIS serves to clients. IIS serves only files with extensions registered in the MIME type list.

MIME types can be defined globally for IIS, and additional MIME types can be defined at the Web site, Web site directory, and Web site virtual directory level.


IIS 6.0 returns an error (404.3) if a request refers to a file with a file extension that is not in the MIME mapping or script mapping. To remedy the 404.3 error, you must add the requested file extension to the MIME mapping. Click MIME Types on the open dialog box to configure MIME mappings.

MIME Types

Click to configure MIME mappings. These mappings set the various file types that the World Wide Web Publishing Service (WWW service) returns to browsers.

Related Topics

To learn more about MIME types and the metabase history feature, see the IIS 6.0 online documentation on the Microsoft Windows Server TechCenter.