Set up your domain
To start using a custom domain (contoso.com) with Microsoft 365, you need to verify your domain and configure your domain's DNS records.
You can add and manage DNS records using the administrative tools at your domain host, or give Microsoft control of your domain records and we'll set them up for you.
Let Microsoft 365 manage your DNS records
Manage your own DNS records
For instructions, see Create DNS records at any DNS hosting provider