Outlook.com Premium is Microsoft's subscription offer for the service and it has been in preview phase since April last year, and then opened to the public on October 2016. The offer was first discovered back in February 2016 and now, around a year later, it has achieved general availability, even though Microsoft hasn't made any official announcement yet.
The subscription to Outlook.com Premium currently costs $19.95 per year, but it will increase to $49.99 annually after March 31, 2017. For that price, the user will receive the following features:
- Five personalized email addresses with a custom domain for up to five users, which is bought from GoDaddy for an extra $10 per year - but apparently free for the first year. Also, if the user already owns a custom domain, it can be used with the service at no extra charge.
- Easy sharing of calendar, contacts and documents powered by the new Outlook.com platform and by OneDrive for those users sharing the custom domain.
- Ad-free inbox when accessing those e-mail addresses via Outlook.com on the web.
Finally, Microsoft is offering the subscription service only to US customers for now and hasn't yet shared if, or when it will become available in other regions.