Previously, the "Send Technician Email" setting which controlled whether TimeZest sent a confirmation email to the scheduled technician (and whether it included an attached .ics invitation) was a global setting, found in the "Email Settings" page.
We've now moved this to the appointment type page in preparation for some future changes to TimeZest, and this means you can now have different settings for each appointment type if you wish. Your existing global setting has been transferred to the appointment types, so if you do nothing, everything will operate precisely as before.