Proper directive to pass requests

Hi All
I’m building my configuration slowly. Thanks for all the help so far.
My
current obstacle is this:

As it is now, external users will access an internal IIS web server by
using http://my.domain.com. The firewall points to the web server and
the
web server automatically redirects to https://my.domain.com.

I’m trying to fit nginx between the firewall and the web server and
figure
out how to configure nginx to respond to requests for
http://my.domain.com
and proxy that to the web server. What do I use with the proxy_pass
directive to get this to work?

Would “proxy_pass http://my.domain.com; work” ?

Regards