My customer wants to decommission their old Windows Server 2008 file servers. The file shares contain lots of user home folders, group drive and data, application data etc. I would like to implement CIFS based solution using Netapp Filer and migrate all the data from the old servers to the Netapp NAS. Then use some kind of logon script mount the shares when user client machines boot up. The access to the shares are controlled using AD Security groups at present. I would like to know will the existing folder permissions be messed up if the shares are migrated to a CIFS based share ? What would be the implication of migration and what is the best possible way to handle the data migration and permissions from the old windows based share to the new CIFS environment.