All cPanel accounts have a primary domain name associated with them. This main domain can only be changed by raising a Tech Support Ticket.
When you submit your support request you'll need to specify
- the cPanel account username
- the existing domain name
- the new domain name you wish to use.
NOTE
The cPanel username itself (your cPanel username) will not and cannot change.
All existing mailboxes will be renamed
All existing user@oldprimary.com mailboxes, will be renamed to user@newprimary.com
