> For the complete documentation index, see [llms.txt](https://help.security.gallagher.com/knowledge-hub/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.security.gallagher.com/knowledge-hub/products/cc-software/troubleshoot/command-centre-errors/new-selfsignedcertificate-is-not-recog.md).

# New-SelfSignedCertificate is not recognized as the name of a cmdlet

[Command Centre - Errors](/knowledge-hub/products/cc-software/troubleshoot/command-centre-errors.md) › New-SelfSignedCertificate is not recognized as the name of a cmdlet

| Error content                                                                                                               | Description                                                                    |
| --------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------ |
| PowerShell: `New-SelfSignedCertificate : The term 'New-SelfSignedCertificate' is not recognized as the name of a cmdlet...` | Occurs when generating a self-signed certificate for use with the REST Client. |

![PowerShell error: New-SelfSignedCertificate not recognized](https://328339335-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F6bM8WhlBE9BYizPWJaPN%2Fuploads%2Fgit-blob-5317d6cd8c4d0098056053c441869b71426f5174%2FSECHUB-CCS-ERR-SELF-SIGNED-CERT-01.png?alt=media)

## Resolution

On **v8.20 or later**, go to **Server Properties → Web Services** and tick or untick **"Do not require pinned client certificates"**.

From v8.20, this built-in toggle replaces the manual PowerShell self-signed certificate generation for REST Client setup.


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