1- Log into your cPanel account.
2- In the Domains section, click on Subdomains Icon.
3- Under the Modify a Subdomain list you can see a list of subdomains.
4- Click the Manage Redirection link that corresponds to the subdomain that you wish to manage.
5- Under the Subdomain Redirection option, you should enter the link to which you want to redirect the subdomain in the available text box.