Microsoft Corp. agreed to buy corporate social-network operator Yammer Inc. for $1.2 billion in cash to help it woo businesses with Facebook-like tools that help employees collaborate in the workplace. San Francisco-based Yammer will become part of Microsoft’s Office division and the team will continue to report to current Yammer Chief Executive Officer David Sacks, the companies said today in a statement. Yammer provides features — similar to those found on Facebook Inc. — to more than 200,000 companies such as Ford Motor Co. and EBay Inc. The purchase will help Microsoft compete with corporate-social features like Salesforce.com Inc.’s Chatter product, as well as startups such as Jive Software Inc. and Asana Inc., run by Facebook co-founder Dustin Moskovitz. Read the full story at Businessweek.