@echo off

setlocal enableextensions enabledelayedexpansion

set FILE=file.xml

set RESULT=file.xml.updated

set TAG=^<server^>

set TEXT=%COMPUTERNAME%

for /f "delims=" %%a in ('more %FILE%') do @(

echo "%%~a"|find /i "%TAG%" >nul

if ERRORLEVEL 1 @echo %%a >> %RESULT% && goto :NEXTLINE

for /f "tokens=1,3 delims=><" %%b in ("%%~a") do @echo:^<%%b^>%TEXT%^<%%c^> >> %RESULT%

:NEXTLINE

)

move /y %RESULT% "%FILE%" > NUL

goto :EOF

set "FILE=file.xml"

set "RESULT=file.xml.updated"

set "TAG=<server>"

set "TEXT=%COMPUTERNAME%"

<"%FILE%">%result% (for /f "delims=" %%a in ('more') do @(

echo "%%~a"|>nul find /i "%TAG%" && (

for /f "tokens=1,3 delims=><" %%b in ("%%~a") do @echo:^<%%b^>%TEXT%^<%%c^>

) || (

echo %%a

)

)

)& >nul move %RESULT% "%FILE%"

goto :EOF