Robocopy wont reset archive attribute with /M switch..incremental backup to zip folder...partially RESOLVED!!!

Question

hello, OS server 2012, 2008 r2, w7 ult.
I want to make backup only files which have archive attribute set. /M switch is what I need but robocopy wont reset archive bit from subfolders and only reset bit on files in root of source folder. How to force robocopy to reset archive bit from all copied
files???
This is syntax:
@echo off
set year=%date:~10,4%
set month=%date:~4,2%
set day=%date:~7,2%
SET Now=%Time: =0%
SET Hours=%Now:~0,2%
SET Minutes=%Now:~3,2%
Robocopy c:\source c:\dest /m /s /r:1 /w:1 /log:"c:\dest\Incremental_%month%-%day%-%year% %hours%h-%minutes%m.log" /NP
"C:\Program Files\7-Zip\7z.exe" a -tzip -mx1 C:\c\Incremental_%month%-%day%-%year%-%hours%h-%minutes%m.zip C:\dest
echo Y | DEL C:\Temp\*.*
I can use attrib command but I have in working folder 900.000 files so this is not option.
edit....robocopy work as expected in 2012 standard. /M switch reset archive attribute so I can use robocopy for incremental backups.
Script: c:\a is source and c:\b is destination. c:\b\temp is temporary folder from where 7zip package backed up files to archive. After 7zip finish jod script delete all files folders from temp folder. I want to use zip archive because this will be much
easier for file system. With time I will have some zip files instead 10000000 files or folders. Zip files will have in name date and time for easier tracking. 
@echo off
set year=%date:~10,4%
set month=%date:~4,2%
set day=%date:~7,2%
SET Now=%Time: =0%
SET Hours=%Now:~0,2%
SET Minutes=%Now:~3,2%
Robocopy c:\a c:\b\temp /s /m /r:1 /w:1 /log:"c:\b\temp\Incremental_%month%-%day%-%year% %hours%h-%minutes%m.log" /NP
"C:\Program Files\7-Zip\7z.exe" a -tzip -mx1 C:\b\Incremental_%month%-%day%-%year%-%hours%h-%minutes%m.zip C:\b\Temp
set folder="C:\b\temp\"
cd /d %folder%
for /F "delims=" %%i in ('dir /b') do (rmdir "%%i" /s/q || del "%%i" /s/q)

Answer 1

Hi,
Thank you for your helpful sharing! This will help others who are fighting with similar issues.
Regards,
Mandy
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