Email individual technician when request is assigned

Several of our technicians have requested that they be emailed when a request is assigned to them. I see an option in the settings called 'Alert technician by email when a request is assigned', but there is no option to pick which technicians this setting will apply to. From reading the forums and other ServiceDesk Plus posts, it sounds like this setting formerly would email every technician instead of only the technician the request actually was assigned to.

Has this functionality changed? I hate to enable this setting without knowing what it does. I see where this was brought up around 3 years ago and was logged as a change request, but I never saw where it was updated: https://pitstop.manageengine.com/portal/community/topic/alert-technician-by-email-when-a-request-is-assigned-individually

We are on SDP v. 9.3 Build 9330.