Surface 5 needs a specific domain e-mail to be used.

I customer brought in a Microsoft surface 5 laptop that had no operating system.  I could not install windows 10 or 11. Then I found out from one of the microsoft community that this laptop lags the basic in-built system. So I downloaded and made a bootable USB.  I brought it to factory setting level.  Then login wanted a non-personal e-mail address. So I created a registered a domain name and e-mail. Now the login says it is not the specific domain name.

My client bought 3 such laptops in an auction. These laptops were sold to a particular organization. So it expecting to use a particular doamin name in username e-mail.  How do I find as to what that should be?

All help will be appreciated.