I'm just synchronizing the old mail server to the new one, and since the synchronizing works pretty smoth i thought it might be possible to use it also as a way to make zimbra (pre 5.x) capable of shared folders by putting the synchronizing script to keep the folders up to date into a cron job?

would this do any harm? or could it even be a good approach to do this?
the load issues for synchronizing should not be an issue