cyberfido
How could I do this letting me in the future an easy restore of the information in case someone needs access to that account?
Archive the user home folders with tar, save them to USB attached to the server.
Then delete all those messages & other data files in the users home folder, off the server using mc or command line
Remember that backup is your ONLY copy of those messages & if it fails in the future you will not be able to restore anything, so make a second copy on a seperate disk for redundancy purposes.
Then lock the user accounts.
You can easily restore those messages & files directly to the server (in the correct format for the sme server mail server etc) if needed in future.
Something like this should do
cd /home/e-smith/files/users
mount the USB drive
tar -czvf /media/USBmount/username1.tar.gz username1
tar -czvf /media/USBmount/username2.tar.gz username2
tar -czvf /media/USBmount/username3.tar.gz username3
and so on...
See here for concepts
http://wiki.contribs.org/Backup_server_config#Copying_data_to_the_restored_server