Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
To have what you seek/require if you are not prepared to use outlook.com would require that you purchased a Business version of 365 which supports full exchange (Obviously paying for each user)
Or you purchase separately an Exchange host from a third party which can be used in the 365 Home version
- Using POP or IMAP and forwarding from Google works.
- Purchasing some third party hosted Exchange, plus Office365 could work.
- Purchasing Office365 Business will work too.
The question here was why, why, why not provide such a simple functionality to add your own domain to Office365 Home (paying) subscribers - after all we do have a license for 5 users! It is there in the Business editions, so functionality is not an issue for Microsoft.
I guess it s just a marketing (i.e. money) issue for Microsoft :(