PowerShell, LDAP, and the IADsLargeInteger Interface.

Question

$s = [adsisearcher]'samaccountname=someuser'
$r = $s.FindOne()
$e = $r.GetDirectoryEntry()
$e.Properties['lastlogontimestamp']
Returns System.__COMObject.  I found a function that will take the value of the IADsLargeInteger data and convert it to an Int64 here: 
function AdsLargeIntegerToInt64($adsLargeInteger) {
[Int32]$highPart = $adsLargeInteger.GetType().InvokeMember("HighPart", [System.Reflection.BindingFlags]::GetProperty, $null, $adsLargeInteger, $null)
[Int32]$lowPart = $adsLargeInteger.GetType().InvokeMember("LowPart", [System.Reflection.BindingFlags]::GetProperty, $null, $adsLargeInteger, $null)
[Int64]("0x{0:x8}{1:x8}" -f $highPart, $lowpart)
...but I'm at a loss as to how do you write a value back to the property as, $e.Property['propertyname'].Value = 3450892348124 doesn't work. -- even when using .CommitChanges() and .RefreshCache() to try and verify the data.
Any help would be appreciated.

Answer 1

Searching always helpful ('powershell iadslargeinteger'). Here's one result:
http://bsonposh.com/archives/226
Function listed there:
function ConvertADSLargeInteger {
param(
$adsLargeInteger
$highPart = $adsLargeInteger.GetType().InvokeMember("HighPart","GetProperty",$NULL,$adsLargeInteger,$NULL)
$lowPart = $adsLargeInteger.GetType().InvokeMember("LowPart","GetProperty",$NULL,$adsLargeInteger,$NULL)
$bytes = [System.BitConverter]::GetBytes($highPart)
$tmp = [System.Byte[]]@(0,0,0,0,0,0,0,0)
[System.Array]::Copy($bytes,0,$tmp,4,4)
$highPart = [System.BitConverter]::ToInt64($tmp, 0)
$bytes = [System.BitConverter]::GetBytes($lowPart)
$lowPart = [System.BitConverter]::ToUInt32($bytes, 0)
$lowPart + $highPart
I would note that he recommends DirectorySearcher as it's just simpler and more straightforward.
-- Bill Stewart [Bill_Stewart]