<s:Envelope xmlns:msxsl="urn:schemas-microsoft-com:xslt" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:tns="http://www.stella-npf.ru/guard/exchange/wsdl" xmlns:s="http://schemas.xmlsoap.org/soap/envelope/" xmlns:misc="http://www.stella-npf.ru/misc">
   <s:Body>
      <GetEmployeePhotoResponse xmlns="http://www.stella-npf.ru/guard/exchange/wsdl">
         <Photo>/9j/4AAQSkZJ...</Photo>
      </GetEmployeePhotoResponse>
   </s:Body>
</s:Envelope>

<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
   <soap:Body>
      <m:GetEmployeePhotoResponse xmlns:m="www.exchange_1c.org">
               <m:return xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
                Здесь двоичные данные
               </m:return>
      </m:GetEmployeePhotoResponse>
   </soap:Body>
</soap:Envelope>

<xs:element name="GetEmployeePhotoResponse">
        <xs:complexType>
          <xs:sequence>
          <xs:element name="Photo" type="xs:base64Binary">
          <xs:annotation>
          <xs:documentation>Фотография</xs:documentation>
          </xs:annotation>
          </xs:element>
          </xs:sequence>
        </xs:complexType>
      </xs:element>