This kind older news, but we have some of you in the forums who are not aware of the update.

Users who are using 3.1.4 should upgrade directly to 4.0.4

Major issues fixed for the 4.0.4 release:

------------------------------------------
Zimbra Connector for Outlook fixes
------------------------------------------
10774
The ZCO now correctly installs for all locales.

11227
The ZCO GAL now receives deleted content from the server
during the periodical syncs.

11302
All appointments in shared accounts can be viewed.

11636,11796
Several bugs that crashed Outlook have been fixed.

11809,11914
All shared calendars are correctly displayed.

11982
Attendee information from a meeting acceptance notification
correctly displays in the organizer’s account.

------------------------------------------
Zimbra Migration fixes
------------------------------------------
11373,
11812
Calendar appointment migrations are more robust.
Zimbra Collaboration Suite fixes

8467
Upgrading an LDAP replica will not promote the LDAP replica to
master. See LDAP Replication Issues below for more details.

11508
An update to support the latest ActiveSync firmware for WM5
phones is available.

11636
Incremental backups are now restored correctly. Under certain
conditions an incremental restore errored due to missing blob
files. This was fixed.

12082
The CLI, zmperditionctl, now correctly sets POP and IMAP
ports.


The entire Release Notes PDF can be viewed here:
http://www.zimbra.com/pdf/Zimbra%20N...se%20Notes.pdf