It finally happened! It's now possible to change the SharePoint/OneDrive domain name for your organization in Microsoft 365. So, for example, if your organization's name changes from "Contoso" to "Fabrikam," you can change contoso.onmicrosoft.com to fabrikam.onmicrosoft.com. Unfortunately, organizations haven't had the option to do so — until now…
What is Tenant?
To reiterate quickly, a 'tenant'