# Subject alternative names

**URL:** <https://community.letsencrypt.org/t/subject-alternative-names/122606>\
**Category:** Help\
**Created:** [May 13, 2020, 10:39am UTC](https://community.letsencrypt.org/t/subject-alternative-names/122606 "2020-05-13T10:39:40Z")\
**Posts on this page:** 1\
**Showing post:** 5

<div class="post-metadata">

**Author:** ![gamliel](https://sea3.discourse-cdn.com/letsencrypt/user_avatar/community.letsencrypt.org/gamliel/32/39394_2.png) [@gamliel](https://community.letsencrypt.org/u/gamliel)\
**Post date:** [May 13, 2020, 4:38pm UTC](https://community.letsencrypt.org/t/subject-alternative-names/122606/5 "2020-05-13T16:38:18Z")

</div>

- $identifier = New-ACMEIdentifier $dnsIdentifiers;
- 

```auto
                           ~~~~~~~~~~~~~~~

```

```auto

  * CategoryInfo : InvalidData: (:) [New-ACMEIdentifier], ParameterBindingArgumentTransformationException
  * FullyQualifiedErrorId : ParameterArgumentTransformationError,New-ACMEIdentifier

Get-ACMEChallenge : Cannot process argument transformation on parameter 'Authorization'. Cannot convert the
"System.Object[]" value of type "System.Object[]" to type "AcmeAuthorization".
At line:183 char:39

* $challenge = Get-ACMEChallenge $state $authZ "http-01";
```

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