Your domain name will be added in the account as alias domain and you will be able to send and receive email from alias (your domain). Adding your domain name as secondary or primary not possible in legacy/standard accounts.
These legacy accounts come with their own domain as default, which is called primary domain name and it can’t be removed or changed, it will remain with the account forever. Suppose primary domain name of the account is primary.com.
Your domain name will be added as alias, suppose your domain name is yourdomain.com. To create user like firstname.lastname@example.org you will create email@example.com and login using firstname.lastname@example.org at every service including Gmail, drive, calendar and sharing links or anything.
But when you want to send email, you will login to Gmail using email@example.com and send email, your sender will be firstname.lastname@example.org instead of email@example.com. See this:
You will receive emails on firstname.lastname@example.org and reply address will also be from email@example.com.
You can’t login using firstname.lastname@example.org, login would have to be done using email@example.com. This primary domain name is a random domain name owned by us and we will transfer it to you.
Here are some frequently asked questions:
Do I have to register primary domain?
The domain name is registered by us (saving you initial $10), will be transferred to you. It will be just a few weeks old, you will renew it after 11 months.
How many alias domains can I add and can I add it myself?
You can add as many as 20 alias domains and you can add them yourself.
Will sending email from alias work in any mail app?
Sending email from alias would work with Gmail in browser, Gmail mobile app and in outlook. (you will need to set from address firstname.lastname@example.org in outlook desktop client). See here how: https://tinyurl.com/gsuitealias
How multiple alias would work?
You will add alias domain as the first one and when writing email, you will be able to select the domain from which you want to send email. See below:
Will my email delivery be affected by using domain as alias?
How the primary domain will be transferred to me?
The domain name is most likely registered at Dynadot.com, Epik.com or namesilo.com. We will push the domain to your account at the same registrar if it’s less than 60 days old. You can get authorization/EPP code and transfer it to any registrar you want when domain name gets 60 days old.