@arukashi I think we don't support migration of Tasks: our implementation is quite different from Zimbra's, so I can not think of any easy workaround, sorry.
How to Migrate Zimbra to Carbonio? Manually
First, open the Zimbra desktop client and select the Preferences tab.
Next, select Import/Export and choose “All Folders” to Export.
Now, choose the mailbox to export and hit the Export button.
Lastly, choose the location as per your choice to save the emails.
Not sure if this is still useful for somebody, but here are two scripts, that migrate some more parts: removed link
- Mails
- Calendar (default name "Calendar")
- Contacts (default name "Contacts")
- Filters (zimbraMailSieveScript)
- Tasks (default Name "Tasks")
- Distribution Lists
Some things are still missing, but they might be added later. Contributions welcome.
Thanks to the community for the good resources out there, that helped me to put this together 👍