Talk about silver platters... here's a script I wrote to enumerate all available properties in your AD.
Code:
ListAdsiToTxt("DOMAIN\username","@SCRIPTDIR\username.txt")

Function ListAdsiToTxt($strADObject, $strLogFile)
  Global $objLog
  Dim $objCN, $objLDAP, $objLDAPSchema, $objFSO, $objProperty
  $objCN = TranslateName($strADObject)
  $objLDAP = GetObject("LDAP://" + $objCN)
  $objLDAPSchema = GetObject($objLDAP.schema)
  $objFSO = CreateObject("Scripting.FileSystemObject")
  $objLog = $objFSO.OpenTextFile($strLogFile, 8, 1)
  $objLog.WriteLine("Mandatory Properties:")
  $objLog.WriteLine("---------------------")
  $objLog.WriteLine("")
  For Each $objProperty In $objLDAPSchema.MandatoryProperties
    If NOT InStr($objProperty,"-")
      $=Execute("$$strPropType=VarTypeName($$objLDAP."+$objProperty+")")
      $=Execute("$$strPropValue=$$objLDAP."+$objProperty)
      $s = ""
      Select
        Case $strPropType = "Object"
          WriteLog($objProperty,$strPropType)
        Case $strPropType = "Variant[]"
          WriteLog($objProperty,$strPropType)
          For Each $item In $strPropValue
            WriteLog("*"+$objProperty,$strPropType,$item)
          Next
        Case $strPropType = "Byte[]"
          $comma = ""
          For $i=0 to Len($strPropValue)
            $s=$s+$comma+Right("0"+DecToHex(Asc(SubStr($strPropValue,$i,1))),2)
            $comma = ","
          Next
          WriteLog($objProperty,$strPropType,$s)
        Case 1
          WriteLog($objProperty,$strPropType,$strPropValue)
      EndSelect
    Else
      WriteLog($objProperty,"N/A")
    EndIf
  Next
  $objLog.WriteLine("")
  $objLog.WriteLine("Optional Properties:")
  $objLog.WriteLine("--------------------")
  $objLog.WriteLine("")
  For Each $objProperty In $objLDAPSchema.OptionalProperties
    If NOT InStr($objProperty,"-")
      $= Execute("$$strPropType=VarTypeName($$objLDAP."+$objProperty+")")
      $= Execute("$$strPropValue=$$objLDAP."+$objProperty)
      $s = ""
      Select
        Case $strPropType = "Object"
          $objDate = Integer8Date($strPropValue)
          WriteLog($objProperty,$strPropType,$objdate)
        Case $strPropType = "Variant[]"
          WriteLog($objProperty,$strPropType)
          For Each $item In $strPropValue
            WriteLog("*"+$objProperty,$strPropType,$item)
          Next
        Case $strPropType = "Byte[]"
          $comma = ""
          For $i=0 to Len($strPropValue)
            $s=$s+$comma+Right("0"+DecToHex(Asc(SubStr($strPropValue,$i,1))),2)
            $comma = ","
          Next
          WriteLog($objProperty,$strPropType,$s)
        Case 1
          WriteLog($objProperty,$strPropType,$strPropValue)
      EndSelect
    Else
      WriteLog($objProperty,"N/A")
    EndIf
  Next
  $objLog.Close
EndFunction

Function WriteLog($LineToWrite,$sType,Optional $sValue)
  Select
    Case Len($sType) < 9
      $sType = $sType+Chr(9)+Chr(9)
    Case Len($sType) >= 9
      $sType = $sType+Chr(9)
    Case 1
      ? "Other Type?"
  EndSelect
  Select
    Case Len($LineToWrite) < 8
      $objLog.WriteLine($LineToWrite+Chr(9)+Chr(9)+Chr(9)+Chr(9)+Chr(9)+$sType+$sValue)
    Case Len($LineToWrite) >= 8 AND Len($LineToWrite) < 16
      $objLog.WriteLine($LineToWrite+Chr(9)+Chr(9)+Chr(9)+Chr(9)+$sType+$sValue)
    Case Len($LineToWrite) >= 16 AND Len($LineToWrite) < 24
      $objLog.WriteLine($LineToWrite+Chr(9)+Chr(9)+Chr(9)+$sType+$sValue)
    Case Len($LineToWrite) >= 24 AND Len($LineToWrite) < 32
      $objLog.WriteLine($LineToWrite+Chr(9)+Chr(9)+$sType+$sValue)
    Case Len($LineToWrite) >= 32
      $objLog.WriteLine($LineToWrite+Chr(9)+$sType+$sValue)
    Case 1
      ? "Other Len?"
  EndSelect
EndFunction

Function TranslateName($NameToTranslate)
  Dim $NameTranslate
  $NameTranslate = CreateObject("NameTranslate")
  $NameTranslate.Init(3,"")
  $NameTranslate.Set(3,$NameToTranslate)
  $TranslateName = $NameTranslate.Get(1)
EndFunction

Function Integer8Date($objDate,optional $lngBias)
   Dim $lngHigh,$lngLow,$lngDate,$Pow,$l,$jdate,$lngYear,$lngMonth,$lngDay,$s,$m,$h
   If NOT (VarType($objDate) & 9) Exit 87 EndIf
   If VarType($lngBias)=0
      $lngBias = Val(ReadValue("HKLM\System\CurrentControlSet\Control\TimeZoneInformation\","ActiveTimeBias"))
      If @ERROR Exit @ERROR EndIf
   EndIf
   
   $lngHigh = $objDate.HighPart 
   $lngLow = $objDate.LowPart 
   If $lngLow < 0 $lngHigh=$lngHigh+1 EndIf
   If $lngHigh = 0 AND $lngLow = 0 $lngBias=0 EndIf
   $Pow=2.0
   For $l = 1 to 31 $Pow=2.0*$Pow Next
   $lngDate = ((CDbl($lngHigh)*$Pow+$lngLow)/600000000-$lngBias)/1440 
   If $lngDate > 0
      $jdate = 584389 + Fix($lngDate)
      $lngYear = (100*(((100*($jdate+306)-25)/3652425)-(((100*($jdate+306)-25)/3652425)/4))+
         (100*($jdate+306)-25))/36525 
      $lngMonth = (5*(((100*($jdate+306)-25)/3652425)-(((100*($jdate+306)-25)/3652425)/4)+
         ($jdate+306)-365*$lngYear-$lngYear/4)+456)/153 
      $lngDay = (((100*($jdate+306)-25)/3652425)-(((100*($jdate+306)-25)/3652425)/4)+
         ($jdate+306)-365*$lngYear-$lngYear/4)-(153*$lngMonth-457)/5 
      If $lngMonth>12 $lngYear=$lngYear+1 $lngMonth=$lngMonth-12 EndIf 
      $lngMonth = Right("0"+$lngMonth,2) 
      $lngDay = Right("0"+$lngDay,2) 
      
      $s = Fix(86400.0 * ($lngDate-Fix($lngDate)))
      $m = $s / 60
      $s = $s mod 60
      $h = $m / 60
      $m = $m mod 60
      $Integer8Date=''+$lngYear+'/'+$lngMonth+'/'+$lngDay+' '+$h+':'+Right("0"+$m,2)+':'+Right("0"+$s,2)
   EndIf
EndFunction