I have a Lync 2013 (installed on 2012R2 on the domain) install that works perfectly on the inside network. I added an Edge server also on 2012R2 (not on the domain and network discovery fixed) and I will not work outside the internal network. MS Connectivity Analyzer says my autodiscover works and the port is open but there is something wrong with the cert. I have contacted GoDaddy and they insist it is a server config issue (that would be fine but the outside traffic can tunnel through to say the cert isnt right) and everything suggests the Edge server is letting traffic through. I really need the help of someone who has a setup a simple Lync configuration and its working. The network is simple for the Lync. One FE Server (Lync) and one Edge Server pointing to the firewall, thats it. ANY help would be appreciated.