{
  "Type" : "AWS::DirectoryService::SimpleAD",
  "Properties" : {
    "Name" : "corp.example.com",
    "Password" : { "Ref" : "SimpleADPW" },
    "Size" : "Small",
    "VpcSettings" : { 
      "SubnetIds" : [ { "Ref" : "subnetID1" }, { "Ref" : "subnetID2" } ],
      "VpcId" : { "Ref" : "vpcID" }
    }
  }
}