Updated connect-azuread cmdlet with example for service principal sign in

Author: RobdeJong

Azure AD Cmdlets/AzureAD/v2/Connect-AzureAD.md

@@ -66,11 +66,45 @@ You cannot use multi-factor authentication or Microsoft account credentials to r
 
 ### Example 3: Connect a session as a service principal
 ```
-PS C:\> Connect-AzureAD -TenantId "xxxx-xxxx-xxxx-xxxx" -ApplicationId "xxxx-xxxx-xxxx-xxxx" -CertificateThumbprint "xxxx-xxxx-xxxx-xxxx"
+# Login to Azure AD PowerShell With Admin Account
+Connect-AzureAD 
+
+# Create the self signed cert
+$currentDate = Get-Date
+$endDate = $currentDate.AddYears(1)
+$notAfter = $endDate.AddYears(1)
+$pwd = "<password>"
+$thumb = (New-SelfSignedCertificate -CertStoreLocation cert:\localmachine\my -DnsName com.foo.bar -KeyExportPolicy Exportable -Provider "Microsoft Enhanced RSA and AES Cryptographic Provider" -NotAfter $notAfter).Thumbprint
+$pwd = ConvertTo-SecureString -String $pwd -Force -AsPlainText
+Export-PfxCertificate -cert "cert:\localmachine\my\$thumb" -FilePath c:\temp\examplecert.pfx -Password $pwd
+
+# Load the certificate
+$cert = New-Object System.Security.Cryptography.X509Certificates.X509Certificate("C:\temp\examplecert.pfx", $pwd)
+$keyValue = [System.Convert]::ToBase64String($cert.GetRawCertData())
+
+
+# Create the Azure Active Directory Application
+$application = New-AzureADApplication -DisplayName "test123" -IdentifierUris "https://test123"
+New-AzureADApplicationKeyCredential -ObjectId $application.ObjectId -CustomKeyIdentifier "Test123" -StartDate $currentDate -EndDate $endDate -Type AsymmetricX509Cert -Usage Verify -Value $keyValue
+
+# Create the Service Principal and connect it to the Application
+$sp=New-AzureADServicePrincipal -AppId $application.AppId
+
+# Give the Service Principal Reader access to the current tenant (Get-AzureADDirectoryRole)
+Add-AzureADDirectoryRoleMember -ObjectId 5997d714-c3b5-4d5b-9973-ec2f38fd49d5 -RefObjectId $sp.ObjectId
+
+# Get Tenant Detail
+$tenant=Get-AzureADTenantDetail
+# Now you can login to Azure PowerShell with your Service Principal and Certificate
+Connect-AzureAD -TenantId $tenant.ObjectId -ApplicationId  $sp.AppId -CertificateThumbprint $thumb
+
 ```
 
 This command authenticates the user to Azure Active Directory as a service principal.
 
+
+
+
 ## PARAMETERS
 
 ### -AadAccessToken