I have a web app running on Azure "Cloud Service (Classic)" VMs on Windows Server 2012 R2. My TLS certificate is valid (I just double checked) but as of a few weeks ago (maybe longer) my HTTPS endpoint now returns an ERR_CONNECTION_RESET. The HTTP endpoint resolves fine. Other than updating my certificate a year ago, I have changed nothing of significance on my VM configuration (as far as I can tell). Can anyone suggest some steps to troubleshoot? I am at a loss how to figure this out since I changed very little in the past year. I thought maybe my site was still somehow using SSL and not TLS, but from what I've read, TLS is the default on 2012. Any advice would be appreciated.