About robocopy from VNXe to Powerscale

Hi

We are migrating CIFS area data from VNXe to Powerscale. When copying with the RoboCopy command, all files become modified.
I would like to know the settings required for differential copy.
  Options : *.* /FFT /V /FP /BYTES /TEE /S /E /COPYALL /PURGE /MIR /B /NP /IT /R:0 /W:0
isi smb settings global modify --ignore-eas=yes
SMB Share Run as root

Sincerely