RACKIT
The only place you need to update is their email address in their Agent Profile. Unless they are also the Admin Email (Admin Panel > Emails > Settings > Admin Email). If that doesn’t help then it’s most likely the settings in the system like they are not configured to receive alerts for the Department, etc. A good test would be to create a Ticket where you know they should be alerted, login to the INBOX of the system email that’s sending the alerts, and check the Sent folder to see if they are being sent and not received or not sent at all. If being sent then the issue is outside of osTicket. If not then like I said above it’s likely they are not configured to receive alerts.
Cheers.