No built-in email (Exchange) APP in Oxygen 2.0.1!

I got my OnePluse two last week, but i was wondering why there is no built-in email (Exchange) application in Oxygen 2.0.1!
it's really disappointed me lot. Is there any way to bring manually. I don’t want to install any third-party app like Nine, Touchdown etc….

waiting for experts advise :crying: