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Set-IISConfigAttributeValue

Sets a configuration attribute value for an IIS configuration section or configuration element attribute. Windows Server PowerShell reference

From the Windows Server PowerShell reference 3 parameters Its page in the reference

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Parameters

3 in the Windows Server PowerShell reference
-AttributeNameSpecifies the name of the attribute for which the value will be set.
-AttributeValueSpecifies the new value of the attribute.
-ConfigElementSpecifies the IIS ConfigurationSection or ConfigurationElement for which the attribute value will be looked up.