Can the store, index and db location be easily changed?

For example, is there a config file that specifies:


I'm working from the command line and doing a backup for a new client. This is the first time I have looked at their system and there's some artifacts (index and store folders in other locations with recent dates) that lead me to believe the index, store and db have been re-located outside of /opt/zimbra... Any help help is greatly appreciated.