Store all your contacts in one place for all your accounts

on this page:

Zimbra on your Desktop

However, I cannot find how to perform this. I have several accounts set up in Zimbra Desktop (one Zimbra Network Verions, one Zimbra open source version, one gmail, one yahoo and two imaps).

I sure would like to know how to have one address book.

To further complicate I am using Active Sync for calendar and contacts.

thanks very much,