diff --git a/GetADUserLastLogonTime.psm1 b/GetADUserLastLogonTime.psm1
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+#--------------------------------------------------------------------------------- 
+#The sample scripts are not supported under any Microsoft standard support 
+#program or service. The sample scripts are provided AS IS without warranty  
+#of any kind. Microsoft further disclaims all implied warranties including,  
+#without limitation, any implied warranties of merchantability or of fitness for 
+#a particular purpose. The entire risk arising out of the use or performance of  
+#the sample scripts and documentation remains with you. In no event shall 
+#Microsoft, its authors, or anyone else involved in the creation, production, or 
+#delivery of the scripts be liable for any damages whatsoever (including, 
+#without limitation, damages for loss of business profits, business interruption, 
+#loss of business information, or other pecuniary loss) arising out of the use 
+#of or inability to use the sample scripts or documentation, even if Microsoft 
+#has been advised of the possibility of such damages 
+#--------------------------------------------------------------------------------- 
+
+Function Get-OSCLastLogonTime
+{
+<#
+ 	.SYNOPSIS
+        Get-OSCLastLogonTime is an advanced function which can be used to get active directory user's last logon time.
+    .DESCRIPTION
+        Get-OSCLastLogonTime is an advanced function which can be used to get active directory user's last logon time.
+    .PARAMETER  SamAccountName
+        Specifies the SamAccountName
+    .PARAMETER  CsvFilePath
+		Specifies the path you want to import csv files.
+    .EXAMPLE
+        C:\PS> Get-OSCLastLogonTime -SamAccountName "Administrator","lindawang"
+
+        SamAccountName                   LastLogonTimeStamp                                                   
+        --------------                   ------------------                                                   
+        administrator                    9/25/2013 2:23:43 AM                                                 
+        lindawang                        12/31/1600 4:00:00 PM 
+
+		This command will list all active directory users' last logon time info.
+    .EXAMPLE
+        C:\PS> Get-OSCLastLogonTime -CsvFilePath C:\Script\SamAccountName.txt
+        
+        SamAccountName                   LastLogonTimeStamp                                                   
+        --------------                   ------------------                                                   
+        administrator                    9/25/2013 2:23:43 AM                                                 
+        lindawang                        12/31/1600 4:00:00 PM 
+
+		This command will list user's last logon time info from your specified csv file.
+#>
+
+    [CmdletBinding(DefaultParameterSetName='UserName')]
+    Param
+    (
+        [Parameter(Mandatory=$true,Position=0,ParameterSetName='UserName')]
+        [String[]]$SamAccountName,
+        [Parameter(Mandatory=$true,Position=1,ParameterSetName='CsvFilePath')]
+        [String]$CsvFilePath
+    )
+    
+    #The first ParameterSetName
+    If($SamAccountName)
+    {
+        Foreach($UserName in $SamAccountName)
+        {
+            #Invoke the custome method
+            QueryActiveDirectory -UserName $UserName
+        }
+    }
+
+    #The second ParameterSetName
+    If($CsvFilePath)
+    {
+        If(Test-Path -Path $CsvFilePath)
+        {
+            If((Get-ChildItem -Path $CsvFilePath).Extension -eq ".csv")
+            {
+                $SamAccountName = (Import-Csv -Path $CsvFilePath).SamAccountName
+                
+                ForEach($UserName in $SamAccountName)
+                {
+                    QueryActiveDirectory -UserName $UserName
+                }
+            }
+            Else
+            {
+                Write-Warning "The file is not a csv file, please check it."
+            }
+        }
+        Else
+        {
+            Write-Warning "The path '$CsvFilePath' cannot find. Please make sure that it exists."
+        }
+    }
+}
+
+Function QueryActiveDirectory([String]$UserName)
+{
+    $Filter = "(&(objectCategory=User)(SamAccountName=$UserName))"
+            
+    $Domain = New-Object System.DirectoryServices.DirectoryEntry 
+    $Searcher = New-Object System.DirectoryServices.DirectorySearcher
+    $Searcher.SearchRoot = "LDAP://$($Domain.DistinguishedName)"
+    $Searcher.PageSize = 1000
+    $Searcher.SearchScope = "Subtree"
+    $Searcher.Filter = $Filter
+    $Searcher.PropertiesToLoad.Add("DistinguishedName") | Out-Null
+    $Searcher.PropertiesToLoad.Add("LastLogonTimeStamp") | Out-Null
+
+    $Results = $Searcher.FindAll()
+    
+    #Check if the account exists.
+    If($Results.Count -eq 0)
+    {
+        Write-Warning "The SamAccountName '$UserName' cannot find. Please make sure that it exists."
+    }
+    Else
+    {
+        Foreach($Result in $Results)
+        {
+            $DistinguishedName = $Result.Properties.Item("DistinguishedName")
+            $LastLogonTimeStamp = $Result.Properties.Item("LastLogonTimeStamp")
+            
+            If ($LastLogonTimeStamp.Count -eq 0)
+            {
+                $Time = [DateTime]0
+            }
+            Else
+            {
+                $Time = [DateTime]$LastLogonTimeStamp.Item(0)
+            }
+            If ($LastLogonTimeStamp -eq 0)
+            {
+                $LastLogon = $Time.AddYears(1600)
+            }
+            Else
+            {
+                $LastLogon = $Time.AddYears(1600).ToLocalTime()
+            }
+
+            #Output in comma delimited format.
+            $Hash = @{
+                        SamAccountName = $UserName
+                        LastLogonTimeStamp = $(If($LastLogon -match "12/31/1600")
+                                               {
+                                                    "Never Logon"
+                                               }
+                                               Else
+                                               {
+                                                    $LastLogon
+                                               })
+                     }
+            $Objs = New-Object -TypeName PSObject -Property $Hash
+
+            $Objs                        
+        }
+    }
+}
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+theme: jekyll-theme-cayman
\ No newline at end of file
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