Error when Challenging

I’m using the ACMESharp Quick Start guide and have hit an issue - I’m getting an error when I enter the HTTP Challenge:

PS C:\Users\Administrator.DCG> New-ACMEIdentifier -Dns -Alias managedstorage

IdentifierPart : ACMESharp.Messages.IdentifierPart
IdentifierType : dns
Identifier :
Uri :
Status : pending
Expires : 2018-08-23 5:34:58 PM
Challenges : {, , }
Combinations : {2, 1, 0}

PS C:\Users\Administrator.DCG> Complete-ACMEChallenge managedstorage -ChallengeType http-01 -Handler iis -HandlerParameters @{ WebSiteRef = ‘Default Web Site’ }

Complete-ACMEChallenge : Invalid URI: The URI scheme is not valid.
At line:1 char:1

  • Complete-ACMEChallenge managedstorage -ChallengeType http-01 -Handler …
  •   + CategoryInfo          : NotSpecified: (:) [Complete-ACMEChallenge], UriFormatException
      + FullyQualifiedErrorId : System.UriFormatException,ACMESharp.POSH.CompleteChallenge

I don’t understand the error - I have followed the steps in the guide, but am clearly missing something. Can anyone shed light on where I’ve gone wrong?



"managedstorage" might need to be the FQDN ("")

I tried that, too, thinking it might need it, but it did not like that either.

I tried the manual DNS method and added a TXT record to my DNS; it is still pending after about 3 hours when I check the Update-ACMEIdentifier command.



Out of curiosity, what provider hosts your DNS? You may not have to use the manual method if your provider is in this list and are willing to give a different client a try.

My DNS provider is CIRA (the Canadian Internet authority - they have a managed DNS service I use).

I did try the manual DNS method; it’s been in pending status for 24 hours now, so there is clearly something wrong. Can I flush the request and re-do it?

Or, if there is another client you would recommend, I’m happy to try it.



An authz remains pending until you run the command to make it go (or it expires, which currently happens after one week).

I don’t know anything about ACMESharp, but skimming the quick start, it looks like that’s the step after “Complete-ACMEChallenge”, which is where you got stuck…

Still, there’s probably nothing wrong on Let’s Encrypt’s end.


Thanks - It was something I’d done (or not, as the case may be) - I misread a step.

Thanks for the push.


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