@ECHO OFF
for /f %%x in ('wmic path win32_localtime get /format:list ^| findstr "="')
do set %%x
set today=%Year%%Month%%Day%
"C:\xxx\xxx\Desktop\FileName" + today-1 + ".xlsx"
:: Q:\Test\2018\10\11\SO_52760062.cmd
@ECHO OFF
for /f "usebackq" %%A in (`
powershell -NoP -C "(Get-Date).AddDays(-1).ToString('yyyyMMdd')"
`) Do Set Yesterday=%%A
echo "C:\xxx\xxx\Desktop\FileName%Yesterday%.xlsx"