Outlook Premium provides custom domains for $49.99 per year
Microsoft Outlook Premium is not a new service. It has been being tested since earlier this year, but now, it is publicly available. At least, Microsoft made it public for the users within the United States. It normally costs $49.99 per year, but with a promotion, this price is $19.95 now.
For this price, Microsoft removes the ads for you, but most importantly, provides you a custom domain. The Outlook Premium subscribers can create a completely new domain or use their own. If you decide to create a new one though, Microsoft buys your desired domains on the behalf of you, and then, they provide you these domains for free for the first year. Then, they additionally charge you per year.
With these domains though, you are given the ability to create five personalized email addresses.
The service is live, but only for the users in the United States. It is also important to mention that the service is currently in the preview.
Source | Outlook