Hello,
I’ve got a csv I’m reading from with the following headers:
LastName FirstName OldUserName NewUserName Department EmailAddress OldHomeDirectory NewHomeDirectory OldDN NewDN olddisplayname newdisplayname
I’m unsure how to construct the variables from that CSV. 
Some examples on the Internet show $($headervalue) as the way, or can I access it like $variable.headervalue?
function Set-ARSEADProperties
{
$debugPreference = "Continue"
Write-Debug "Gathering Users"
$userADList = Import-Csv \\fs10\home\kvanmeeteren\test_Migration_10_6_2015.csv | Select-Object *
$psobjectCollection = @()
foreach ($individualUser in $userADList)
{
#Gather variables
$samaccountName = $individualUser.oldusername
Write-Debug "Processing $samaccountName"
$distinguishedName = $individualUser.olddn
$firstName = $individualUser.firstname
$lastName = $individualUser.lastname
$newDN = $individualUser.newdn
$firstNameDotLastName = $individualUser.newusername
#change samaccountname, displayname, and clear profile path attribute.
#finally move to new OU
if ($samAccountName -ne $firstNameDotLastName)
{
Write-Debug "Performing migration on $samaccountName"
Rename-ADObject -Identity $distinguishedName -NewName "$newDN" -ErrorAction Stop -WhatIf
Get-ADUser $samAccountName | Set-ADUser -SamAccountName $firstNameDotLastName -DisplayName "$newDN" -HomeDirectory $null -PassThru -ErrorAction Stop -WhatIf | Move-ADObject -TargetPath "ou=newusers,dc=contoso,dc=com" -ErrorAction Stop -WhatIf
}
catch
{
Write-Host "Error migrating user. Press Ctrl+C to stop script or Enter to continue" -ForegroundColor Red
Pause
}
finally
{
$newpath = "\\fs12\e$\home\$firstNameDotLastName"
}
}
Write-Debug "Waiting for domain controllers to sync and verifying user migration is complete..."
do
{
$newuserADList = Get-ADUser -SearchBase "ou=newusers,dc=contoso,dc=com" -Filter { samaccountname -like $firstNameDotLastName } -Properties Name, Surname, DistinguishedName, GivenName, SamAccountName, Description, HomeDirectory, Department | sort Surname
Write-Host "Still waiting..." -ForegroundColor Cyan
$samaccountstring = "$firstNameDotLastName"
Start-Sleep -Seconds 5 -ErrorAction 'Ignore'
}
until ($newuserADList.surname -like '*')
foreach ($newindividualUser in $newuserADList)
{
Write-Debug "Gathering post migration details"
$newuserInfo = [ordered]@{
LastName = $newindividualUser.Surname
FirstName = $newindividualUser.GivenName
NewSamAccountName = $newindividualUser.samaccountname
OldSamAccountName = $individualUser.oldusername
NewDisplayName = $newindividualUser.name
OldDisplayName = $individualUser.olddisplayname
NewHomeDirectoryAttribute = $newindividualUser.HomeDirectory
OldHomeDirectoryAttribute = $individualUser.HomeDirectory
NewPhysicalHomeDrivePath = $newpath
OldPhysicalHomeDrivePath = $oldpath
NewDistinguishedName = $newindividualUser.DistinguishedName
OldDistinguishedName = $individualUser.olddn
}
}#end new user foreach
$psObject = New-Object -TypeName System.Management.Automation.PSObject -property $newuserInfo
$PSObjectCollection += $PSObject
}#end foreach
Write-Debug "Creating Results Output"
$psobjectCollection | ogv -Title "Migration Results"
$csvMigrationStatus = New-Item -ItemType File c:\Users\kvanmeeteren\Desktop\MigrationResults_$((get-date).toString('MM-dd-yyyy HH.mm.sstt')).csv
$PSObjectCollection | Export-Csv -Path $csvMigrationStatus -NoTypeInformation