Today, Microsoft has released some new Yammer statistics, which shows that the enterprise social network has surpassed 7 million registered users, which at the time of acquisition last year it had only 5 million registered users.

Microsoft has announced that it will be buying enterprise social network Yammer for $1.2 billion in cash. The social network will be folded into the Office division, where it will continue to be developed as an independent product.

According to the Wall Street Journal, Microsoft is set to acquire business and enterprise social networking company Yammer for $1 billion.