Exchange Domain Name change

Hi,

Recently i just change my exchange email domain name.

I have changed from @abc to @123. 

Changed Virtual directory access as well. 

However, on OWA it was still possible to access to both mail.abc.com/owa and mail.123.com/owa

Is it possible to only allow mail.123.com/owa to be accessible? without deleting the old accepted domain ( abc.com)?

Thank you