Surprising move is likely aimed at pushing users towards the cloud-based Office 365 solution.
Microsoft has announced record financial results, with Steve Ballmer announcing $16.20 billion in revenue for the first quarter of its 2011 fiscal year, with $5.41 billion in profit.
Microsoft has revealed more than 20 million people have used Office Web Apps in the 100 days since it has launched.
Microsoft has started selling Office 2010 to consumers, with three different versions of the software available to purchase.
Microsoft's web-based email is still the most popular service of its type, although Hotmail has trailed behind Google's Gmail in terms of its features and overall ease-of-use for some years now.
Microsoft has gone on the offensive in its battle with the paid for Google Apps for businesses, publishing a series of case studies from companies that are glad they plumped for Exchange.