How to make a personalized email address with Microsoft

David, I don't really understand the question. You made a web site for a client. You want a microsoft address for that web site i.e. email address removed for privacy reasons ? Or do you want to map an existing microsoft (or 365) address to it? i.e. email address removed for privacy reasons? Since MSFT does not host externally facing websites, you would have to work through your hoster to setup email with them. If your client is using 365 there is a way to map the email to it. But it requires you to pick up licenses for the email clients. Or am I misunderstanding?