We're in the Central time zone and just discovered this today. It looks like the default time zone for all our COS is "(GMT-08.00) Pacific Time (US & Canada)".
Apparently this is the default no matter where you install the product?
Is it safe to set the zimbraPrefTimeZoneId to our own time zone for all our COS? Or will this break calendar appointments for everyone and make everything go off by two hours?