Mail Accounts still shows old email

Mail Accounts still shows old email

I created the Zoho account with one domain and that domain has changed.  I was able to change the email address and organization to the new domain.  But, under Control Panel / Mail Accounts, it still shows the old domain.  It also shows the old domain in the Zoho Mail inbox.

Also, when I select that account, it tells me it does not have a domain based mail alias.

How to I fix that account to show the correct domain