Outlook add-ins are located in the HKEY_CURRENT_USER\ SOFTWARE\Microsoft\Office\Outlook\Addins registry subkey and the HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\Outlook\Addins registry subkey.
The individual available add-ins are listed in the Addins subkeys. Within each Add-ins subkey is a property called LoadBehavior. This property has two possible values: 2 to disable or disconnect the add-in and 3 to enable the add-in.
