If you have ever had to move files from one server to another (or even computer to computer).... you NEED to use ROBOCOPY. It is a built in Windows tool, simple to use and way faster than "drag and drop". I originally asked the above question on SpiceWorks and wanted to share what I found out (and worked). You can read the full responses here.
Move files with permissions:
ROBOCOPY "\\servername\sharelocation" "\\newservername\newsharelocation" /MIR /SEC
- the /SEC switch retains NTFS perms.
- I have used the above command now MANY times with 100% success.