Onboarding Prerequisites for Hosted Essentials

The following actions must be performed before adding the new Hosted Essentials service:

Register the customer sub domain on the Customer tenant (see Register Customer Tenant Sub domain).
Add a new record of the Customer Sub domain in the DNS Zone of the Service Provider tenant (seeRegister Customer Tenant Sub domain).
Activate the domain by activating a M365 user license on the customer tenant (see Activate the Customer Domain).
After Service Provider adds the new customer sub domain to the DNS zone, verify on M365 customer tenant (see Verify Domain)
Perform basic configuration of customer tenant from PowerShell command shell (see Add Voice Route and Online Voice Routing Policy)
Setup Multiple regions (see Setup Multiple Regions)
Add the new service (see Onboarding with Hosted Essentials).