Have you started your project yet? Please remember that forums are not the place to design projects, that is your job as the developer. The experts are here to help you resolve problems in your project. My suggestion is to do more research, come up with a design that meets your requirements and come back with your questions if you haven't started. Thanks.
I am sorry for not discribing my question well. I have already made a design, but i just want to know if there are easy ways that C# can contact Exchange Server.