:NameNAMESPACE
echo Whats the Namespace?
set /p NAMESPACE=Name Namespace:
echo Is %NAMESPACE% correct? (Y)es / (N)o
set /P p=Please choose:
if /i "%wahl%"=="Y" goto:CreateFolder
if /i "%wahl%"=="N" goto:NameNAMESPACE
echo Wrong choise!
goto:NameNAMESPACE

:NameHOSTNAME
echo Whats the Hostname?
set /p HOSTNAME=Name Hostname:
echo Ist %HOSTNAME% correct? (Y)es / (N)o
set /P wahl=Please choose:
if /i "%wahl%"=="Y" goto:CreateFolder
if /i "%wahl%"=="N" goto:NameHOSTNAME
echo Wrong choise!
goto:NameHOSTNAME

<?xml version="1.0" encoding="utf-8" ?>
<root>
  <!--Connection-->
  <add name="V4H_CONNECTIONINFO" value="Server=HOSTNAME;ServicePort=IISPort;ConnectionPort=1972;Namespace=NAMESPACE;ServiceUser=LicenseSlot_0;ServicePassword=!cgm!;Customer=SYS"/>
  <!--URLs-->
  <add name="V4H_URL_CLICKONCE" value="http://HOSTNAME:8010/v4h.Downloader.application"/>
  <add name="V4H_URL_CHANNEL" value="http://HOSTNAME:IISPort"/>
  <add name="V4H_URL_SERVICES" value="http://HOSTNAME:IISPort/Services/ChannelServices.asmx"/>
  <add name="V4H_URL_SILVERLIGHT" value="http://HOSTNAME:IISPort/?ConnectionInfo={0}"/>
  <!--ASP.NET-->
  <add name="V4H_DBCONNECTION_CHANNEL" value="HOSTNAME,1972,NAMESPACE,ChannelServices_{12:0-5},!cgm!,Pooling=false"/>
  <add name="V4H_DEBUGMODE_CHANNEL" value="false"/>
</root>

@echo off &setlocal
set NAMESPACE=TEST_CH_L

set "search=NAMESPACE"
set "replace=%NAMESPACE%"


set "textfile=test.txt"
set "newfile=Output.txt"
(for /f "delims=" %%i in (%textfile%) do (
    set "line=%%i"
    setlocal enabledelayedexpansion
    set "line=!line:%search%=%replace%!"
    echo(!line!
    endlocal
))>"%newfile%"
del %textfile%
rename %newfile%  %textfile%
echo Done
pause