Installing letsencrypt on IIS 7 (intranet). Authorization Result Invalid


I have a problem when setting up https on the intranet site.

My site is intranet site, cannot be accessed outside of my company network.

I have performed the below steps:

  1. Configured site as as like "
  2. Installed Agent as instructed by the command [letsencrypt-win-simple.v1.7] and file has been generated under C:\inetpub\wwwroot\diago.well-known/acme-challenge…
  3. Getting Authorization Result: invalid

The ACME server was probably unable to reach - But I am able to access this url

Check in a browser to see if the answer file is being served correctly.

This could be caused by IIS not being setup to handle extensionless static
files. Here’s how to fix that:

  1. In IIS manager goto Site/Server->Handler Mappings->View Ordered List
  2. Move the StaticFile mapping above the ExtensionlessUrlHandler mappings.
    (like this

All above settings are correct, But https not working. Could you please some one help me on this?


I’m a little confused, but that happens often for me :wink:

If this is an intranet site, not accessible from outside your company network, how do you expect LE to reach it to confirm that URL ? I can’t access it ( but then I probably shouldn’t be able to, like LE, as I’m outside your network).

am I missing something ? the LE server can only check it if there is access generally from the internet.