This attribute is not replicated and is maintained separately on each domain controller in the domain. To get an accurate value for the user’s last logon in the domain, the Last-Logon attribute for the user must be retrieved from every domain controller in the domain. The largest value that is retrieved is the true last logon time for that user.
Manually checking each DC and determinating the largest datetime value of LastLogon is clearly out the question so we’ll use Powershell instead!
To maintain as much flexibility as possible, ease of use and respect already established methods of working against AD with Powershell I’ve created a function that allows pipeline input from Get-ADUser and SamAccountName arrays (read: Import-CSV and Get-Content).
Per usual you’ll find the script at TechNet Gallery!
<# .Synopsis Gets the newest LastLogon date based on data from all Domain Controllers in the Forest. .DESCRIPTION Get the newest LastLogon attribute for the specified user by iterating through all Domain Controllers in the forest. Output is structured and enables sorting, CSV export and further processing. .EXAMPLE # Get LastLogon date for one username: C:\PS> Get-ADUserLastLogon -SamAccountName username DomainController : dc01.contoso.com Enabled : True Name : User Name SamAccountName : username LastLogon : 2015-03-30 15:11:06 .EXAMPLE # Get LastLogon date for multiple usernames and output as table: C:\PS> "username","nameuser" | Get-ADUserLastLogon | Format-Table -AutoSize DomainController Enabled Name SamAccountName LastLogon ---------------- ------- ---- -------------- --------- dc01.contoso.com True User Name username 2015-03-30 15:11:06 dc02.contoso.com True Name User nameuser 2015-03-30 13:58:38 .EXAMPLE # Get LastLogon date for all users under an Organizational Unit: C:\PS> $OU = "OU=ServiceAccounts,DC=contoso,DC=com" C:\PS> $ADUsers = Get-ADUsers -Filter * -SearchBase $OU C:\PS> $ADUsers | Get-ADUserLastLogon -Properties Title .EXAMPLE # Get LastLogon date for the first 50 users of a remote forest and remote credentials: C:\PS> $Cred = Get-Credential C:\PS> Get-ADUserLastLogon -All -Count 50 -Forest contoso.org -Credential $Cred .EXAMPLE # Get LastLogon date for the first 5 users and output the AD User object of the first users: C:\PS> $Result = Get-ADUserLastLogon -All -Count 5 -Passthru C:\PS> $Result.TargetObject .INPUTS [System.String] [Microsoft.ActiveDirectory.Management.ADUser] .OUTPUTS [System.Management.Automation.PSObject] .PARAMETER SamAccountName Account name, as a string, to get LastLogon date. .PARAMETER ADUser Account, from Get-ADUser cmdlet, to get LastLogon date. .PARAMETER All Gets all AD users of the specified domain. Use together with -Count parameter to restrict amount of results. .PARAMETER Count Max amount of results when using -All parameter. .PARAMETER Forest Name of the remote forest. Needs to be resolvable. .PARAMETER Properties Adds AD attributes to the output. .PARAMETER Passthru Adds the Get-ADUser cmdlet output object into the TargetObject property. .PARAMETER Credential Credentials to use with Get-ADUser and/or connecting to a remote forest. .NOTES Version: 20150330.1 Author: Daniel Grenemark Email: firstname.lastname@example.org Twitter: @desek Blog: https://runbookautomation.wordpress.com/ .LINK https://runbookautomation.wordpress.com https://twitter.com/desek #>
TechNet Gallery URL: https://gallery.technet.microsoft.com/Get-AD-User-Last-Logon-4c6b6fa6