I have used the following options to sync up an FTP directory structure between two ftp servers without copying the data files themselves. This command will only copy the folder structure including empty folders from the source to the destination folder.
xcopy /T /E c:/source_folder c:/destination_folder
If you have used other xcopy switches please drop me a line.
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For reference I have copied some additional info below.
source Specifies the file(s) to copy.destination Specifies the location and/or name of new files./A Copies only files with the archive attribute set,doesn't change the attribute./M Copies only files with the archive attribute set,turns off the archive attribute./D:m-d-y Copies files changed on or after the specified date.If no date is given, copies only those files whosesource time is newer than the destination time./EXCLUDE:file1[+file2][+file3]...Specifies a list of files containing strings. Each stringshould be in a separate line in the files. When any of thestrings match any part of the absolute path of the file to becopied, that file will be excluded from being copied. Forexample, specifying a string like \obj\ or .obj will excludeall files underneath the directory obj or all files with the.obj extension respectively./P Prompts you before creating each destination file./S Copies directories and subdirectories except empty ones./E Copies directories and subdirectories, including empty ones.Same as /S /E. May be used to modify /T./V Verifies the size of each new file./W Prompts you to press a key before copying./C Continues copying even if errors occur./I If destination does not exist and copying more than one file,assumes that destination must be a directory./Q Does not display file names while copying./F Displays full source and destination file names while copying./L Displays files that would be copied./G Allows the copying of encrypted files to destination that doesnot support encryption./H Copies hidden and system files also./R Overwrites read-only files./T Creates directory structure, but does not copy files. Does notinclude empty directories or subdirectories. /T /E includesempty directories and subdirectories./U Copies only files that already exist in destination./K Copies attributes. Normal Xcopy will reset read-only attributes./N Copies using the generated short names./O Copies file ownership and ACL information./X Copies file audit settings (implies /O)./Y Suppresses prompting to confirm you want to overwrite anexisting destination file./-Y Causes prompting to confirm you want to overwrite anexisting destination file./Z Copies networked files in restartable mode./B Copies the Symbolic Link itself versus the target of the linkThe switch /Y may be preset in the COPYCMD environment variable.This may be overridden with /-Y on the command line.