I need to extend LDAP database which is in Zimbra as default. I'm thinking about adding some new fields to the existing database. I'm importing database from another program and there are some more fields than in Zimbra.

I know that LDAP has a directory sturcture and in 6.0+ versions it is in /opt/zimbra/data but I still don't know which file I can edit and how...

I'd be grateful if anybody would like to help me.