Set web.config for letsencrypt - Certify with Asp.NET Core and Angular 2 (Javascript-services)

Question

I am trying to install letsencrypt certificate with Certify, but I get error, which (I think) has nothing to do with Certify. Problem is how my web.config is configured for

Answer 1

Put this in the .\.well-known\acme-challenge\Web.Config file just next to the Lets Encrypt DNS verification file(s). No need to change the Web.Config you already have. All it does it tell IIS to cough up files without extension in the directory where this Web.Config resides with mime type text/plain as Lets Encrypt expects that.