Steps to Configure Automated After-Hours Responses:
1) Setup Operational hours and Holidays:
Access ServiceDesk Plus Admin configuration, navigate to Service Desk Configuration and configure
Operational hours and
Holidays. This ensures the application knows when after-hours tickets are created.
Add a template with the customized content and associate it with the Notification Action.

Please note that the URL included for the Solution articles in the notification is a public link that does not require login access.
Update the URL as per your instance URL.
Non-login view for Solutions needs to be enabled under Admin > General Settings > Advanced Portal Settings > General.