SharedScripts/Get-LoggedOnUser/Get-LoggedOnUser.ps1

<#
.Synopsis
Queries a computer to check for interactive sessions

.DESCRIPTION
This script takes the output from the quser program and parses this to PowerShell objects

.NOTES   
Name: Get-LoggedOnUser
Author: Jaap Brasser
Version: 1.2.1
DateUpdated: 2015-09-23

.LINK
http://www.jaapbrasser.com

.PARAMETER ComputerName
The string or array of string for which a query will be executed

.EXAMPLE
.\Get-LoggedOnUser.ps1 -ComputerName server01,server02

Description:
Will display the session information on server01 and server02

.EXAMPLE
'server01','server02' | .\Get-LoggedOnUser.ps1

Description:
Will display the session information on server01 and server02
#>
param(
    [CmdletBinding()] 
    [Parameter(ValueFromPipeline=$true,
               ValueFromPipelineByPropertyName=$true)]
    [string[]]$ComputerName = 'localhost'
)
begin {
    $ErrorActionPreference = 'Stop'
}

process {
    foreach ($Computer in $ComputerName) {
        try {
            quser /server:$Computer 2>&1 | Select-Object -Skip 1 | ForEach-Object {
                $CurrentLine = $_.Trim() -Replace '\s+',' ' -Split '\s'
                $HashProps = @{
                    UserName = $CurrentLine[0]
                    ComputerName = $Computer
                }

                # If session is disconnected different fields will be selected
                if ($CurrentLine[2] -eq 'Disc') {
                        $HashProps.SessionName = $null
                        $HashProps.Id = $CurrentLine[1]
                        $HashProps.State = $CurrentLine[2]
                        $HashProps.IdleTime = $CurrentLine[3]
                        $HashProps.LogonTime = $CurrentLine[4..6] -join ' '
                        $HashProps.LogonTime = $CurrentLine[4..($CurrentLine.GetUpperBound(0))] -join ' '
                } else {
                        $HashProps.SessionName = $CurrentLine[1]
                        $HashProps.Id = $CurrentLine[2]
                        $HashProps.State = $CurrentLine[3]
                        $HashProps.IdleTime = $CurrentLine[4]
                        $HashProps.LogonTime = $CurrentLine[5..($CurrentLine.GetUpperBound(0))] -join ' '
                }

                New-Object -TypeName PSCustomObject -Property $HashProps |
                Select-Object -Property UserName,ComputerName,SessionName,Id,State,IdleTime,LogonTime,Error
            }
        } catch {
            New-Object -TypeName PSCustomObject -Property @{
                ComputerName = $Computer
                Error = $_.Exception.Message
            } | Select-Object -Property UserName,ComputerName,SessionName,Id,State,IdleTime,LogonTime,Error
        }
    }
}