Letsencrypt 1.9.4 DNS Problem NXDOMAIN looking up A

Hi @Deeg,

Seems your IIS 10 doesn't know how to serve files without extension, take a look to this post to let know IIS how to serve files without extension in acme-challenge dir.

This is the info shared by @JSpraul:

JSpraul
Feb '16

I used GitHub - win-acme/win-acme: A simple ACME client for Windows (for use with Let's Encrypt et al.) with the following web.config in the acme-challenge directory to avoid a 404.17 IIS error ('The requested content appears to be script') blocking download of the challenge:

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <system.webServer>
        <staticContent>
            <mimeMap fileExtension="." mimeType="text/plain" />
        </staticContent>
    </system.webServer>
</configuration>

Cheers,
sahsanu