Zimbra Connector for Outlook users
zmfixtz changes will be synced to Outlook. Users should still install the patch from KB article 931836.
We do not recommend that users run the Outlook Time Zone Data Update Tool. zmfixtz will perform the same set of changes and will enable the changes to be propagated to all clients. There is no harm in running the Outlook Time Zone Data Update Tool if a user chooses to do so.
The point of installing the OS time zone patch for these users is that newly created appointments will be correct. Newly created appointments will be incorrect until the OS time zone patch is applied. Note that zmfixtz will fix these appointments, but as long as the user does not have the OS time zone patch the appointment will not display correctly.