This policy setting allows you to ensure that any Internet Explorer add-ons not listed in the 'Add-on List' policy setting ...

Windows Server 2003

"This policy setting allows you to ensure that any Internet Explorer add-ons not listed in the 'Add-on List' policy setting are denied.

By default, the 'Add-on List' policy setting defines a list of add-ons to be allowed or denied through Group Policy. However, users can still use the Add-on Manager within Internet Explorer to manage add-ons not listed within the 'Add-on List' policy setting. This policy setting effectively removes this option from users - all add-ons are assumed to be denied unless they are specifically allowed through the 'Add-on List' policy setting.

If you enable this policy setting, Internet Explorer only allows add-ins that are specifically listed (and allowed) through the 'Add-on List' policy setting.

If you disable or do not configure this policy setting, users may use Add-on Manager to allow or deny any add-ons that are not included in the 'Add-on List' policy setting.

Note: If an add-on is listed in the 'Add-on List' policy setting, the user cannot change its state through Add-on Manager (unless its value has been set to allow user management - see the 'Add-on List' policy for more details)."

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