Beside the usual Alert settings underAdmin Panel > Settings > Alertsyou'd need to give the agent access to the other departments via the group membershipAdmin Panel > Agents > Group Name > Permissions to all departments neededAdmin Panel > Agents > Agent Name > Primary GroupThen make sure the new ticket alert settings in the department is set to "Group and department membership"Admin Panel > Agents > Departments > Department Name > Alerts > Group and department members@[deleted]Please correct if something's wrong - we don't use any extended permissions here in our company, so I know the procedure in theory but never really used / needed it.