How to add a new Email account related to my domain

How to add a new Email account related to my domain

Ok, I have a domain and using the email from Zoho with admin@mysite.com
Now, I wish to have another email account with support@mysite.com. I go to Cpanel>Add users and send an Invite.
As I want to create a new account with support@mysite.com, how can an Invite be accepted?
If I try to login via mail.zoho.com with support one, it says we have sent you an email please activate using that link. How am I supposed to activate this?