If you already have a website with your domain that is hosted outside Office 365 operated by 21Vianet, it doesn’t move to Microsoft 365 when you add your domain. You can keep hosting your website where it is, while you use Microsoft 365 to host your email as well as use team sites, instant messaging, and so on. In the domains setup wizard, choose Yes when asked if you have a website you currently use.
Note: To learn how you get started using your domain with Microsoft 365, see Add a domain to Office 365. We’ll show you the steps the domains setup wizard includes that guide you through adding your domain to your Microsoft 365 subscription, changing your email address (which is also your user ID for Microsoft 365) to use your domain name, and setting up your users’ email addresses with your domain.
