Zimbra Desktop - wrong time

[yumibad]

When an appointment is sent, it appears with the wrong time and the Argentine time zone in the invitation.
The calendar shows the correct time, the problem is only in the invitation.
Another problem is that the work schedule appears wrong. It is configured to appear by default from 8:00 am to 5:00 pm, but it appears with the working hours from 7:00 am to 4:00 pm. This error only occurs on the zimbra desktop with windows 10.
Does anyone know how to fix this error? My correct time zone would be Brazil