Expired computer account in NT Domain

[vass0922]

Is there an app, or some way by script to find all computers in a domain that have not been active for a set period of time?


Does NT automatically purge old computer accounts? If so at what age?

I'm trying to find something by script using ADSI but haven't found anything

Thoughts?
(Note I'm talking about computer accounts in the domain, not user accounts)

[meese]

As far as I know computer accounts do not expire. You can disable them, similar to use accounts. Even if you delete an account and recreate another with the same name it will get a different SID.

Not sure how to find inactive computers. One way may be to check the DHCP lease for the machines. The default lease time on a W2K DHCP server is 8 days. You can increase that if you want.

[DVNT1]

I may have altered it a little from when I first got it but this checks last logon date and writes it to a file.

'************************************************* ******************
' ADWorkstationLastLogon.vbs
' VBScript to determine when each computer in the domain
' lastlogged on.
'
' ------------------------------------------------------------------
' Copyright (c) 2002 Richard L. Mueller
' Version 1.2 - January 23, 2003
' Modified - March 4, 2003 Kevin Buley
' - Added output lines to show that the script is processing
' (DC name, # x of y)
' Modified March 5, 2003 Mark M. Webster
' - Modified output to be fixed width for import
' - Made several structural modifications and
' additional comments
'
' Because the LastLogon attribute is not replicated, every Domain Controller
' in the domain must be queried to find the latest LastLogon date for each
' computer. The lastest date found is kept in a dictionary object. The
' program first uses ADO to search the domain for all Domain Controllers.
' The AdsPath of each Domain Controller is saved in an array. Then, for each
' Domain Controller, ADO is used to search the copy of Active Directory on
' that Domain Controller for all computer objects and return the LastLogon
' attribute. The LastLogon attribute is a 64-bit number representing the
' number of 100 nanosecond intervals since 12:00 am January 1, 1601. This
' value is converted to a date. The last logon date is in UTC (Coordinated
' Univeral Time). It must be adjusted by the Time Zone bias in the machine
' registry to convert to local time.
'
' You have a royalty-free right to use, modify, reproduce, and distribute
' this script file in any way you find useful, provided that you agree
' that the copyright owner above has no warranty, obligations, or liability
' for such use.
'************************************************* ***********************************************

Option Explicit

Const ForAppending = 8

Dim k
Dim sDCs() 'Dynamic array to hold the path for all DCs
Dim BiasKey 'Active Time Bias from Registry
Dim Bias 'Time Bias
Dim strAdsPath 'Machine account DN
Dim strDate 'Date output string
Dim sDate 'Local machine current date
Dim lngDate 'LastLogon date
Dim strTime 'Local machine current time
Dim strLDate 'Local machine current date and time
Dim objList 'Dictionary object to track latest LastLogon for each computer
Dim objRoot 'RootDSE object
Dim strConfig 'Configuration Naming Context
Dim objDC 'Domain Controller
Dim strDNSDomain 'Default nameing context
Dim strComputer 'Computer object Name
Dim objConnection 'ADO conection
Dim objCommand 'ADO command
Dim objRecordSet 'Object to hold attributes from AD
Dim oWshShell 'Windows shell script
Dim objFSO 'File System object
Dim objFile 'File object used to open text file for output
Dim objLastLogon 'Last Logon Long Integer attribute
Dim strFilePath 'Path to current directory

Set oWshShell = CreateObject("Wscript.Shell")
Set objFSO = CreateObject("Scripting.FileSystemObject")
strFilePath = objFSO.GetAbsolutePathName(".")

sDate = Date
strTime = Now
StrLDate = DatePart("m",sDate) & "." & DatePart("d",sDate) & "." & Hour(strTime) & "." & Minute(strTime)
Set objFile = objFSO.OpenTextFile (strFilePath & "\DomainLastLogon." & strLDate & ".log",ForAppending,True)

'* Use a dictionary object to track latest LastLogon for each computer.

Set objList = CreateObject("Scripting.Dictionary")
objList.CompareMode = vbTextCompare

'* Obtain local Time Zone bias from machine registry.

BiasKey = oWshShell.RegRead("HKLM\System\CurrentControlSet\C ontrol\TimeZoneInformation\ActiveTimeBias")
If UCase(TypeName(BiasKey)) = "LONG" Then
Bias = BiasKey
ElseIf UCase(TypeName(BiasKey)) = "VARIANT()" Then
Bias = 0
For k = 0 To UBound(BiasKey)
Bias = Bias + (BiasKey(k) * 256^k)
Next
End If

'* Determine configuration context and DNS domain from RootDSE object.

Set objRoot = GetObject("LDAP://RootDSE")
strConfig = objRoot.Get("ConfigurationNamingContext")
strDNSDomain = objRoot.Get("DefaultNamingContext")

'* Use ADO to search Active Directory for ObjectClass nTDSDSA.
'* This will identify all Domain Controllers.

Set objCommand = CreateObject("ADODB.Command")
Set objConnection = CreateObject("ADODB.Connection")
objConnection.Provider = "ADsDSOObject"
objConnection.Open = "Active Directory Provider"
objCommand.ActiveConnection = objConnection


objCommand.CommandText = "<LDAP://" & strConfig & ">;(ObjectClass=nTDSDSA);AdsPath;subtree"
objCommand.Properties("Page Size") = 100
objCommand.Properties("Timeout") = 30
objCommand.Properties("Searchscope") = 2
objCommand.Properties("Cache Results") = False

Set objRecordSet = objCommand.Execute

'* Enumerate parent objects of class nTDSDSA. Save Domain Controller
'* AdsPaths in dynamic array sDCs.

k = 0
Do Until objRecordSet.EOF
Set objDC = GetObject(GetObject(objRecordSet.Fields("AdsPath") ).Parent)
ReDim Preserve sDCs(k)
sDCs(k) = objDC.DNSHostName
k = k + 1
objRecordSet.MoveNext
Loop

'* Retrieve LastLogon attribute for each computer on each Domain Controller.

For k = 0 To Ubound(sDCs)
oWshShell.Popup "Checking 'lastlogon' at domain controller " & sDCs(k) & ". Controller " & k & " of " & Ubound(sDCs),2,"Checking",64


'************************************************* ******************
'* Modify this line for the base of your search path depending on your own AD implementation
'************************************************* ******************

objCommand.CommandText = "<LDAP://" & sDCs(k) & "/OU=AWC," & strDNSDomain & ">;(ObjectCategory=computer);Name,LastLogon;subtre e"
On Error Resume Next
Err.Clear
Set objRecordSet = objCommand.Execute
If Err.Number <> 0 Then
Err.Clear
On Error GoTo 0
oWshShell.Popup "Domain Controller not available: " & sDCs(k),2,"Notice",48
Else
On Error GoTo 0
Do Until objRecordSet.EOF
strAdsPath = objRecordSet.Fields("Name")
strDate = objRecordSet.Fields("LastLogon")
On Error Resume Next
Err.Clear
Set lngDate = strDate
If Err.Number <> 0 Then
Err.Clear
strDate = #1/1/1601#

Else
If (lngDate.HighPart = 0) And (lngDate.LowPart = 0 ) Then
strDate = #1/1/1601#
Else
strDate = #1/1/1601# + (((lngDate.HighPart * (2 ^ 32)) + lngDate.LowPart)/600000000 - Bias)/1440
End If
End If
On Error GoTo 0
If objList.Exists(strAdsPath) Then
If strDate > objList(strAdsPath) Then
objList(strAdsPath) = strDate
End If
Else
objList.Add strAdsPath, strDate
End If
objRecordSet.MoveNext
Loop
End If
Next

'* Output latest LastLogon date for each computer.

For Each strComputer In objList

Call VBOut(strComputer,objList(strComputer))

Next

objFile.WriteBlankLines (3)
objFile.Close

oWshShell.Popup "Output file " & strFilePath & "\DomainLastLogon." & strLDate & ".log created." & Chr(13)_
& " Script processing complete.",5,"Notice",64

'* Clean up.

Set objRoot = Nothing
Set objConnection = Nothing
Set objCommand = Nothing
Set objRecordSet = Nothing
Set objDC = Nothing
Set lngDate = Nothing
Set objList = Nothing
Set oWshShell = Nothing


'************************************************* ******************
'* Function VBOut
'*
'* Format data and write to output file
'*
'************************************************* ******************

Function VBOut(strPC,strTime)

Dim strComputerName 'Formatted computer name output string
Dim strLogonTime 'Formatted Last Logon Time output string

Dim DataOutArray(1) 'This array is used to format the output strings

'* Format computer name string

DataOutArray(0) = strPC
DataOutArray(1) = " "
strComputerName = Join(DataOutArray)
strComputerName = Left (strComputerName, 18)

'* Format Last Logon Time string

DataOutArray(0) = strTime
DataOutArray(1) = " "
strLogonTime = Join(DataOutArray)
strLogonTime = Left (strLogonTime, 24)

'* Write to output file

objFile.WriteLine strComputerName & " " & strLogonTime


End Function

'End of Script

I take the output and open it in Excel, then sort by date.

[vass0922]

:-/ we're not in AD yet.. we've had a few lumps and bumps on the way working up to it you could say... that and politics

Will have to keep that one around for when we do move ahead though

meese, not worried about the SID's just wanted to clean up a resource domain with all of the user PC's in it.

around 7k of 'em so there's gotta be a few dead ones