Hi Rob, I’ve replied to your email. I was asking whether your IIS Site ID could have changed (through re-creating your IIS site?). There’s also the question of are you running as a default config or not? The background service runs as Local System to avoid various permission issues, sometimes Systems permission has been removed but it’s unusual.
HI, try editing your managed certificate, select a different IIS site then re-select the correct IIS site. I suspect somehow the Site ID is incorrect. If that doesn’t work manually set the Authorization > (http-01) Site Root Directory root path to the base directory (such as C:\inetpub\wwwroot\examplesite
Note that the SiteID and path are not important unless the app needs to use IIS as a fallback for http validation, but an invalid value will cause the Test option to fail. By default the app uses a temporary http challenge server instead so the website root path is not important in that case.