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I'm trying to run my Powershell PnP script using ClientId and ClientSecret instead of UseWebLogin. I already created an Azure Application ID using this tutorial (but skipping the certificate part for the moment):

https://yunusemrearac.medium.com/connecting-to-sharepoint-online-using-azure-ad-application-id-via-powershell-49191054ae40

This is my code:

#Install-Module SharePointPnPPowerShellOnline #Config Variables $SiteURL = "https://myname.sharepoint.com/" Try { #Connect to PnP Online Connect-PnPOnline -Url $SiteURL -ClientId "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" -ClientSecret "Sdf9Q~9pZErHkefW0Zt77IryFh-6vk_vI6B-Fch2" Get-PnPsite Disconnect-PnPOnline } catch { write-host "Error: $($_.Exception.Message)" -foregroundcolor Red }

I get this error:

Get-PnPsite : Cannot contact site at the specified URL https://myname.sharepoint.com/. The app principal does not exist. At line:9 char:1

Using the UseWebLogin all is working.

What did I do wrong or miss in creating the Azure Application?

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  • Don't you miss the -Tenant argument? For example: -Tenant 'myname.onmicrosoft.com' Commented Jun 27, 2024 at 5:01
  • No, -Tenant parameter does not exist when using -ClientSecret but it works if I use -Thumbprint, and at this point I wonder if -ClientSecret is usable here. Commented Jun 27, 2024 at 14:18
  • So maybe you're using AppId instead of ClientId... That's why you have the error The app principal does not exist. Commented Jun 27, 2024 at 18:28

1 Answer 1

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If your code works with a cert, but does not work with a secret - I'd suspect a bug somewhere. I use Visual Studio Code, PowerShell 7 and PnP.PowerShell latest version (2.5 as of today).

For app (unattended) access:

  • if you are administering entire SharePoint - you'd have Sites.FullControl.All for both - Graph API and SharePoint API for full access to all sites.
  • if you need to work with one site only - use Sites.Selected permissions

It works just perfectly:

Connect-PnPOnline -Url $siteUrl -ClientId $clientID -ClientSecret $clientSc

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