Outlook inside company network (Intranet) can not load or connect to exchange 2016 automatically without aan internet connection. Both my lab exchange 2016 server and lab PC with outlook 2013 are on same network but without Internet it does not connect to exchange. When i turn Internet ON then it works. AutodiscoverServiceInternalURI for my CAS service is - https://autodiscover.domain.com/autodiscover/autodiscover.xml. I have also checked with https://serverfqdn/autodiscover/autodiscover.xml AutodiscoverServiceInternalURI is responsible for connecting within Intranet, correct ? What am i missing here ?