@echo off
SetLocal EnableExtensions
set "donor=donor.ico"
set "ExampleFolder=source"
set "DestinationFolder=output"
for /F eol^=^ delims^= %%a in ('dir /b /a-d "%ExampleFolder%\*.ico" 2^>NUL') do copy /y "%donor%" "%DestinationFolder%\%%~na.ico"
pause