Zoho Change Domain Name. You will see the DNS records expand and a new row will be added. Follow the same steps to add another MX record for your domain.
Find below the help links for other DNS records MX Records. Enter a name of your choice for the organization. Add a CNAME record with the CNAME provided by Zoho Books and your host name.
Add users and create custom domain email accounts or Import users from a CSV file or from your Active Directory.
Instructions to do it yourself. Enter a name of your choice for the organization. You just can add your existing domain because the option to buy a domain is available on paid plans only. EU users will have to point the CNAME Record to zhszohositeseu.