Whatever your changes.
Let’s log in to your bigrock domain manager account.
go to the primary domain account details.
you can see the domain details with the hosting account.
In Domain Manager, Hosting Settings will be displayed with change password and login button called mange web hosting
Click go to Cpanel button
Cpanel get Opened in a New Tab in your browser
you are right now in Bigrock Cpanel
Enjoy the features of bigrock account , can change it whatever you would like to do.
The primary domain can be changed for any domain name transfer or expiry.