The following commands have been successfully used for file server migration of deeply nested directories having no administrators DACLs or ownership:
subinacl /subdirec *.* /setowner="vs\domain admins"
subinacl /subdirec *.* /grant="vs\domain admins"=F
xcopy "target" \\SOURCE_SYSTEM\SOURCE_FOLDER\ /v /f /s /e /k /r /h /o /x /-y