I have tried to goole to find the way how to sync all the contacts groups that I have in my thunderbird with zimbra.

In thbird I have many contact groups and I need to import them or better sync them with zimbra server. I tried zindus but it coppied all my thbird contact into root contact address book in zimbra but it did not coppied all my contact groups.

Please could anyone help me how to sync even contact groups?