# Printer-Migration.ps1
#
# Required input variables
$NewServer = "\\srv-fs-01"
$OldServer = "\\srv-dc-01"
$Path = "$env:APPDATA\DefaultPrinter.txt"

# Script variables
$Server = [string[]]$OldServer -replace "\\\\"
$Path = "$env:APPDATA\DefaultPrinter.txt"
$DefaultPrinter = Get-WmiObject -Query " SELECT * FROM Win32_Printer WHERE Default=$true"
$DefaultPrinterName = ($DefaultPrinter).name
$OldDefaultServer = ($DefaultPrinter).SystemName
$DefaultPrinter = try {$DefaultPrinter | Select-Object -expandproperty ShareName} catch { "Default printer is not a network printer" }

cls
if (!(Test-Path $Path)) {
    $DefaultPrinter | Out-File -FilePath $path -Force -Encoding "ASCII"
     Write-Host "$DefaultPrinterName written to $path"
     }
else {
    Write-Host "Existing default printer file found"
    }
If ($OldDefaultServer -ne $env:computername) {
    Write-Host "Network default printer found"
     }
else {
     $DefaultPrinter = Get-WmiObject -Query " SELECT * FROM Win32_Printer WHERE Default=$true"  | select-object -expand name
     $DefaultPrinter | Out-File -FilePath $path -Force -Encoding "ASCII"
     Write-Host "Default printer: $DefaultPrinter"

}
# Read text file and set new default printer
$DefaultPrinter = Get-Content $path -TotalCount 1
$Printers = Get-WMIObject -Class Win32_Printer
$SharedPrinters = $Printers | Select-Object -ExpandProperty name
$SharedPrinters = [string[]]$sharedprinters -like "$OldServer*"
$PrinterNames = [string[]]$sharedprinters -replace "\\\\srv-dc-01\\"

# Add new printers
Write-Host "Adding new shared printers..."
If (Test-Connection "$server" -count 2 -quiet) {
foreach ($printer in $PrinterNames) {
(New-Object -ComObject WScript.Network).AddWindowsPrinterConnection("$NewServer\$Printer")
# Remove old printers
Get-WmiObject -Class Win32_Printer | where{$_.SystemName -eq '\\$OldServer'}| foreach{$_.delete()}
}
}
 else {
     Write-Host "Unable to contact server to add new printers"
     Exit
}
# Check if a new default printer was set
Write-Host "Setting new default printer..."
If (($OldDefaultServer -ne $env:computername) -or ($OldDefaultServer -ne $null)){
     try {(New-Object -ComObject WScript.Network).SetDefaultPrinter("$NewServer\$DefaultPrinter")} catch { "No new shared printer found"
     break
     }
} else {
     $DefaultPrinter = "No default printer change was made"
     Write-Host $DefaultPrinter
     Exit
}
# Check current default printer
$NewDefaultServer = Get-WmiObject -Query " SELECT * FROM Win32_Printer WHERE Default=$true" | Select-Object -ExpandProperty SystemName

If ($NewDefaultServer -eq $NewServer) {
     Write-Host "Default Printer was properly set to $NewDefaultServer\$DefaultPrinter"
} else {
     Write-Host Unable to change default printer
}