Export the task sequence SCCM 2012 to XML format (legacy format of sccm 2007)

Below is only applicable from sccm 2012 SP1 and above

With help of Power shell we can extract this in XML format. 

(Get-CMTaskSequence | Where-Object {$_.Name -eq "TEST_TS"}).Sequence | Out-File c:tempTSsequence.txt

param (

[string]$SiteCode,

[string]$TaskSequenceName,

[string]$InputFile

)

#########

# What does it do?

# Script imports a previously "exported" TaskSequence from CM12 to CM12

#

# Howto: Extract the TaskSequence with the following command:

# (Get-CMTaskSequence | where-object {$_.Name -eq $NameOfTaskSequence}).Sequence | Out-File $PathToExportFile

# This will be your $InputFile

#

# Author: David O'Brien, david.obrien@sepago.de

# Created: 28.09.2012

# Prerequisites:

#               - Microsoft System Center Configuration Manager 2012 SP1 (beta)

#               - ConfigMgr Powershell to get your existing TaskSequence

#

#########

$Class = "SMS_TaskSequencePackage"

$Instance = $null

$TS = $null

$NewSequence = $null

$TS = [wmiclass]".rootsmssite_$($SiteCode):$($Class)"

$Instance = $TS.CreateInstance()

$SequenceFile = Get-Content $InputFile

$NewSequence = $Ts.ImportSequence($SequenceFile).TaskSequence

$Instance.Name = "$TaskSequenceName"

$NewTSPackageID = $TS.SetSequence($Instance, $NewSequence).SavedTaskSequencePackagePath