When a server uses dynamic endpoints, the server application must also call RpcEpRegister or RpcEpRegisterNoReplace to register the endpoints.
Both functions add the server's interfaces and binding handles to the "endpoint mapper" database. When the client makes a remote procedure call using a partially bound handle, the client's run-time library asks the server machine's endpoint mapper for the endpoint of a compatible server instance. The client library supplies the interface UUID, protocol sequence, and, if present, the object UUID in the client binding handle. The endpoint mapper looks for a database entry that matches the client's information. The client/server interface UUID, the interface major version, and protocol sequence must all match exactly. In addition, the server's interface minor version must be greater than or equal to the client's minor version.
If all tests are successful, the endpoint mapper returns the valid endpoint and the client run-time library updates the endpoint in the binding handle.