Update service-fabric-powershell-add-application-certificate.md

Just tidying up the script to make these steps easier to follow, had to work a few things out depending on what steps I took like some of the variable names are wrong and one method adds a certificate to the key vault while another sets a secret.

Author: Joseph51D

articles/service-fabric/scripts/service-fabric-powershell-add-application-certificate.md

@@ -44,9 +44,7 @@ $CertName= ""
 $CertPassword= ""
 $PathToPFX= ""
 
-$Cert = new-object System.Security.Cryptography.X509Certificates.X509Certificate2 $PathToPFX, $CertPassword
-
-$bytes = [System.IO.File]::ReadAllBytes($ExistingPfxFilePath)
+$bytes = [System.IO.File]::ReadAllBytes($PathToPFX)
 $base64 = [System.Convert]::ToBase64String($bytes)
 $jsonBlob = @{
    data = $base64
@@ -70,7 +68,12 @@ $ResourceGroupName = ""
 $VMSSName = ""
 $CertStore = "My" # Update this with the store you want your certificate placed in, this is LocalMachine\My
 
+# If you have added your certificate to the keyvault certificates, use
 $CertConfig = New-AzVmssVaultCertificateConfig -CertificateUrl (Get-AzKeyVaultCertificate -VaultName $VaultName -Name $CertName).SecretId -CertificateStore $CertStore
+
+# Otherwise, if you have added your certificate to the keyvault secrets, use
+$CertConfig = New-AzVmssVaultCertificateConfig -CertificateUrl (Get-AzKeyVaultSecret -VaultName $VaultName -Name $CertName).Id -CertificateStore $CertStore
+
 $VMSS = Get-AzVmss -ResourceGroupName $ResourceGroupName -VMScaleSetName $VMSSName
 
 # If this KeyVault is already known by the virtual machine scale set, for example if the cluster certificate is deployed from this keyvault, use
@@ -94,7 +97,8 @@ This script uses the following commands: Each command in the table links to comm
 | Command | Notes |
 |---|---|
 | [New-AzKeyVaultCertificatePolicy](/powershell/module/az.keyvault/New-AzKeyVaultCertificatePolicy) | Creates an in-memory policy representing the certificate |
-| [Add-AzKeyVaultCertificate](/powershell/module/az.keyvault/Add-AzKeyVaultCertificate)| Deploys the policy to Key Vault |
+| [Add-AzKeyVaultCertificate](/powershell/module/az.keyvault/Add-AzKeyVaultCertificate)| Deploys the policy to Key Vault Certificates |
+| [Set-AzKeyVaultSecret](/powershell/module/az.keyvault/Set-AzKeyVaultSecret)| Deploys the policy to Key Vault Secrets |
 | [New-AzVmssVaultCertificateConfig](/powershell/module/az.compute/New-AzVmssVaultCertificateConfig) | Creates an in-memory config representing the certificate in a VM |
 | [Get-AzVmss](/powershell/module/az.compute/Get-AzVmss) |  |
 | [Add-AzVmssSecret](/powershell/module/az.compute/Add-AzVmssSecret) | Adds the certificate to the in-memory definition of the virtual machine scale set |