I have set up a Windows server using SAP Business One, and am trying to fire up the DI Server.
I would like to make a HTTP request with a SOAP body, but I don't know what URL to put in postman.
I also can't figure out how to run the example files in the installation folder for DI Server.
Does anyone know how to get started with DI Server?
Unless you are also using B1WS, starting the DI-Server service doesn't give you a listening HTTP server. You need to write your own listener, for instance as a simple .ashx page hosted under IIS, which accepts a request and passes it to the Interact method of the SBODI_Server.Node object.
See: https://blogs.sap.com/2014/07/28/connecting-an-add-on-to-sap-business-one/