Signing up Zoho One - do I need a Domain Name to trial?

Signing up Zoho One - do I need a Domain Name to trial?

Hi

Simple question - a company wants me to sign them up and demo Zoho One to them - they already have their existing Domain Name and e-mail accounts elsewhere.

So if I create a new account using a DIFFERENT Company Name or a pretend Domain Name and they like the demo - can it be changed to their GENUINE Company Name and Domain Name after?

Thanks for any pointers.

Kind regards
B