Microsoft has announced that its new Outloook.com email service now has more than 400 million active accounts, the company also announced that it has now switched all of its email users over from Hotmail.

Today, we’re excited to announce that we’ve completed upgrading all Hotmail customers to Outlook.com. Coupled with the growing organic excitement for Outlook.com, this has pushed us to over 400 million active Outlook.com accounts, including 125 million that are accessing email, calendar and contacts on a mobile device using Exchange ActiveSync.  We’re also pleased to announce that we’re adding two new features to Outlook.com: SMTP send, so it’s easier to send mail from different email addresses, and deeper integration with SkyDrive.

Microsoft has said that the existing Hotmail email addresses and accounts will still work, although they will now work through the new Outlook.com system.

Source Microsoft