PnP PowerShell: Bad Request when attempting to create a PnPAzureAD App

When running the following command on PowerShell 7.2: Register-PnPAzureADApp -ApplicationName TestApp -Tenant yourtenant.onmicrosoft.com -Store CurrentUser -Username "yourname@domain.com" -Password (Read-Host -AsSecureString -Prompt "Enter Password")

A bad request error is returned on execution:
Register-PnPAzureADApp: {"error":{"code":"Request_BadRequest","message":"A null value was found with the expected type 'Edm.String[Nullable=False]'. The expected type 'Edm.String[Nullable=False]' does not allow null values.","innerError":{"date":"2023-07-31T14:21:28","request-id":"7dbf66db-f159-45dc-b061-7a1dcdc9e323","client-request-id":"7dbf66db-f159-45dc-b061-7a1dcdc9e323"}}}

Does anybody have some insight as to what might be the issue with the command? I am unsure if it is an issue with my environment or some other factor. Any help is appreciated!

Following Azure AD App Only Authentication in SharePoint Online using PnP PowerShell and expected to have obtained a certificate that I could use in my Azure-Functions application.

The error you encountered while running the Register-PnPAzureADApp cmdlet indicates that there might be an issue with the parameters being passed to the cmdlet. The error message specifically mentions that a null value was found with an expected type that does not allow null values.

I tried the same command in my environment, and it created the application successfully.

  Register-PnPAzureADApp -ApplicationName TestApp1 -Tenant abc..com -Store CurrentUser -Username "Abc..com" -Password (Read-Host -AsSecureString -Prompt "Enter Password")

Output:

If you are still facing the issue with the above command, try the below commands to create an AzureAD application

Method 1:

Try with App-Only authentication: Instead of using the -Username and -Password parameters for user-based authentication, you can try using app-only authentication with Interactive mode.

Register-PnPAzureADApp -ApplicationName SPSitesSelected -Tenant abc.com -Store CurrentUser -SharePointApplicationPermissions "Sites.Selected" -Interactive

Method 2:

Try with App-Only Authentication: Instead of using the -Username and -Password parameters for user-based authentication, you can try using app-only authentication with a certificate.

Register-PnPAzureADApp -ApplicationName TestApp -Tenant abc.com -CertificatePath c:\certificate.pfx -CertificatePassword (ConvertTo-SecureString -String "password" -AsPlainText -Force) -Username "yourname@domain.com" -Password (Read-Host -AsSecureString -Prompt "Enter password")

Reference: Register-PnPAzureADApp

I ended up using a wrong build of PnP.PowerShell, installing the nightly build with: Install-Module PnP.PowerShell -Scope CurrentUser -AllowPrerelease -SkipPublisherCheck Did the trick!