Migrate Network Printer from one PrintServer to another. Requires PowerShell v2.

Update-NetworkPrinterServerConnection.ps1

<# 
.SYNOPSIS 
    Migrates network printers from one print server to another.
.DESCRIPTION 
    Migrates all networked printers from one specified print server to another print server.
.EXAMPLE 
    Update-NetworkPrintersServerConnection -OldPrintServer "\\MyOldPS" -NewPrintServer "\\MyNewPS"
.NOTES
    This is done with a ComObject allowing for use in PowerShell V2, before the Get-Printer,Add-Printer and Remove-Printer Cmdlets where introduced.
    http://technet.microsoft.com/en-us/library/dd347648.aspx
    The default printer, if migrated, will be reset as the default printer with the updated connection.
.LINK 
    http://dotps1.github.io
#> 
function Update-NetworkPrintersServerConnection
{
    [CmdletBinding()]
    [OutputType([Void])]
    param
    (
        # ComputerName, Type String, The name(s) of the systems to migrate printers on.
        [Parameter(Position = 0,
                   ValueFromPipeLine = $true)]
        [ValidateScript({ if (Test-Connection -ComputerName $_ -Quiet -Count 2) { return $true } else { throw "Failed to connect to $_.  Please ensure the system is available." } })]
        [String[]]
        $ComputerName = $env:COMPUTERNAME,

        # OldPrintServer, Type String, Name of current Print Server to update from.  String must start with '\\'.
        [Parameter(Mandatory = $true,
                   Position = 1)]
        [ValidateScript({ if ($_.StartsWith("\\")){ return $true } else { throw "Parameter $_ does not start with '\\'." } })]
        [ValidateScript({ if (Test-Connection -ComputerName $_  -Quiet -Count 2) { return $true } else { throw "Failed to ping $_.  Please ensure the system is available." } })]
        [String]
        $OldPrintServer,

        # NewPrintServer, Type String, Name of new Print Server to update to.  String must start with '\\'.
        [Parameter(Mandatory = $true,
                   Position = 2)]
        [ValidateScript({ if ($_.StartsWith("\\")){ return $true } else { throw "Parameter $_ does not start with '\\'." } })]
        [ValidateScript({ if (Test-Connection -ComputerName $_ -Quiet -Count 2) { return $true } else { throw "Failed to ping $_.  Please ensure the system is available." } })]
        [String]
        $NewPrintServer
    )

    Begin
    {
        $comObject = New-Object -ComObject WScript.Network
    }

    Process
    {
        try
        {
            $printers = Get-WMIObject -Class Win32_Printer -Namespace root\CIMV2 -Property ServerName,Default,ShareName,Name,network -ComputerName $ComputerName -ErrorAction Stop
        }
        catch
        {
            throw "Unable to connect to thw Win32_Printer Class on $ComputerName."
        }

        if ($printers -ne $null)
        {
            $defaultPrinter = $printers | ?{ $_.Default -eq $true }
            $oldPrinters = $printers | ?{ $_.ServerName -eq $OldPrintServer }

            foreach ($printer in $oldPrinters)
            {
                $comObject.RemovePrinterConnection("$($printer.Name)")
                $comObject.AddWindowsPrinterConnection("$($NewPrintServer + "\" + $printer.ShareName)")
            }
        }
        
        if ($oldPrinters.ShareName -contains $defaultPrinter.ShareName)
        {
            $comObject.SetDefaultPrinter("$($NewPrintServer + "\" + $defaultPrinter.ShareName)")
        }
    }

    End
    {
        [Void][System.Runtime.InteropServices.Marshal]::ReleaseComObject($comObject)
        Remove-Variable comObject
    }
}