Invalid provider type specified. CryptographicException
Microsoft support helped me out with this line
$myCertThumbprint = (New-SelfSignedCertificate -CertStoreLocation Cert:\CurrentUser\My-subject MyCert -KeyExportPolicy Exportable -NotAfter (Get-Date).AddYears(10) -Type CodeSigningCert -KeySpec Signature).ThumbprintThe AuthClientId and AuthCertThumbprint values I need for the HelloKeyVault app.config are created.
The AuthClientId displays in the portal as the Application ID and is vissible in the Registered app settings.
To get to it click Azure Active Directory -> App registrationsThen click View all applicationsclick on the application then settings
To see the Thumbprint doe the same and then click Keys
I can see AuthClientId
Please use this sample to learn how to use Key Vault with DotNet and authenticate to Azure Active Directory with a Service Principal's Certificatehttps://github.com/Azure-Samples/key-vault-dotnet-quickstart