Update New-AdfsAzureMfaTenantCertificate.md

Made changes reflecting what we did with https://docs.microsoft.com/en-us/powershell/module/adfs/set-adfsazuremfatenant?view=windowsserver2019-ps

Author: msbemba

docset/winserver2019-ps/adfs/New-AdfsAzureMfaTenantCertificate.md

@@ -47,8 +47,7 @@ These commands create a certificate for Azure MFA, register the certificate in a
 ### Example 2: Determine which certificate Azure MFA is using
 ```
 $CertInBase64 = New-AdfsAzureMfaTenantCertificate -TenantID
-$cert = Security.Cryptography.X509Certificates.X509Certificate2
-$cert | Format-List *
+[Security.Cryptography.X509Certificates.X509Certificate2]([System.Convert]::FromBase64String($CertInBase64))
 ```
 
 After AD FS has been configured for Azure MFA, this command determines which certificate Azure MFA is using and when it expires.