[This is preliminary documentation and subject to change]
During IIS installation, default values are assigned to the various properties that are found on the property sheets. Properties can be set on the site level, directory level, or on the file level. Settings on higher levels (such as the site level) are automatically used, or inherited, by the lower levels (such as the directory level) but can still be edited individually at the lower level as well. Once a property has been changed on an individual site, directory, or file, later changes to the master defaults will not automatically override the individual setting. Instead, you will receive a warning message asking whether you want to change the individual site, directory, or file setting to match the new defaults.
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