Microsoft appears to have officially launched its premium email service, Outlook.com Premium, in the United States.

The service, which offers features such as an ad-free inbox, was rolled out to certain users back in April after previously being available as a free add-on for Office 365 Home users. On Tuesday, Microsoft removed the word “preview” from Outlook Premium’s front page, according to Windows tracker Paul Thurrott.

With Outlook Premium, Microsoft is targeting business professionals. Features include up to five personalized emails, or ones that use a domain specific to a company. Users can also share calendars, contacts and documents more easily with people across their domain.

The domains are created through a partnership with GoDaddy.com and are free for the first year. Afterward, users will pay $10 each year to renew them.

Microsoft offers the service for $49.99 a year, but has a special available through March for $19.95 a year.

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