I was creating a second website for additional owa/ecp vdirs (see - https://social.technet.microsoft.com/Forums/office/en-US/04222fae-8f13-4ef3-b3b8-b699d7e547af/exchange-2013-multiple-iis-owa-sites-with-different-authentication?forum=exchangesvrclients&prof=required
Simply created a new website in IIS, and makde a copy of the OWA and ECP folders in C:\Program Files\Microsoft\Exchange Server\V15\FrontEnd\HttpProxy. 2nd website works fine
HOWEVER, now when trying to log into OWA (default web site) - I get "This page could not be displayed.Turn on TLS 1.0, TLS 1.1, and TLS 1.2 in Advanced settings and try connecting tohttps://exservernam.domain.com"? If I go directly to that server and launch owa(https://localhost/owa), I can get into owa fine (just not from other computers (https://servername/owa)?