The NtdsSettingsDN element contains an array of distinguished names specifying the nTDSDSA objects ([MS-ADTS] section of the domain controllers on which to retrieve information.

 <xs:element minOccurs="0" name="NtdsSettingsDN" nillable="true" type="sera:ArrayOfstring" />

The NtdsSettingsDN elements refers to domain controller nTDSDSA objects in the config NC of the directory instance indicated by the server element in the message header (section