Go to the Admin > Settings section by clicking the gear icon on the left-hand menu bar.
Enter the details requested under Your Helpdesk and Your Website.
On Deskpro On-Premise, you will see a Helpdesk URL entry; this should be the web/intranet address where Users can access your Web Portal, e.g.:
While you’re on the Setup page, check that the Default Timezone at the top of the Dates and Times section is set correctly.