Nginx as proxy for Exchange 2013 : RPC?

[jbostoen]

I've been searching the internet and tried a few approaches, but I was
wondering:

Is it possible to use Nginx (non-plus edition) as a proxy for Exchange
(2013) - in particular: RPC. I did manage to get the other stuff working.
Maybe by installing/enabling a (free) module?  

If so, would someone be so kind to share a working config?

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,264518,264518#msg-264518