I need to redirect our company's sub domains (digital.maindomain.org.uk) to a Jira Project on cloud. I am quite new to using Jira and have tiny knowledge on how domain redirection work but I have been asked to get CName or A record entry for my Jira project so that when we hit digital.maindomain.org.uk it should redirect the users to one of my Jira projects.

Any help will be highly appreciated.