Before client applications can locate and use an application server, it must be registered or installed.

• If the application server uses DCOM, HTTP, or sockets as a communication protocol, it acts as an Automation server and must be registered like any other COM server. For information about registering a COM server, see Registering a COM Object.
• If you are using a transactional data module, you do not register the application server. Instead, you install it with COM+ or MTS. .
• When the application server uses SOAP, the application must be a Web Service application. As such, it must be registered with your Web Server, so that it receives incoming HTTP messages. In addition, you need to publish a WSDL document that describes the invokable interfaces in your application. For information about exporting a WSDL document for a Web Service application, see Generating WSDL Documents for a Web Service Application.