Proper setup to use Spam Rpts with Mail Server and IIS

Using Ver 11 of IceWarp Mail Server.  Trying to activate the web reports in order to have email client to authorize or delete email shown in Spam Rpt.

Having issues interfacing Web Service on IceWarp > IIS on Server 2016.  Have port 32000 open on firewall but continue to get 404 error. 

Appears to be a proxy relay issue and have never set up that type of interface. 

IceWarp and IIS are running side by side on one server.  smtp and Pop pass through just fine.