Add the matching IIS certificate to website and active SNI

add-iisbindssl.ps1

$Path = "cert:\localmachine\my"
$Certs = Get-ChildItem -path $Path 

foreach ($cert in $Certs)
{
   #Get Folder-Informationen form Filessystem
   $loop = $loop + 1;

   foreach ($name in $cert.DnsNameList)
   {
     Write-Host  $name -ForegroundColor Green
     New-WebBinding -Name $name -IP "*" -Port 443 -Protocol https -HostHeader $name -SslFlags 1

     $iisPath = "IIS:\SslBindings\!443!" + $name
     New-Item -Path $iisPath -Value $cert -SSLFlags 1
   }

}