….of course this script assumes you loaded your $Profile with all the prereqs.

'Get-ADUser-byEmployeeNumber.ps1'
$employeeNumber = Read-Host -prompt "What employeeNumber? Like 006000, or like *6000 or 0060*"
$results = Get-ADUser -Filter 'employeeNumber -eq $employeeNumber' -Properties Name, employeeNumber, employeeID, DistinguishedName -Server ax-admvdc12.wcnet.co.warren.nj.us -ea SilentlyContinue
if (!($results)){
Get-ADUser -Filter 'employeeNumber -like $employeeNumber' -Properties Name, employeeNumber, employeeID, DistinguishedName -Server ax-admvdc12.wcnet.co.warren.nj.us
}
else {$results}