Microsoft forms new Yammer North team in Redmond

Telefónica is the latest large company to sign up for Office 365

Microsoft: 259 percent growth in Yammer sales last quarter

Microsoft 're-imagining' video reveals secrets of rebranding, hints of what's to come

Microsoft's Yammer adds new language translator feature

Microsoft: Over 7 million registered Yammer users

Microsoft: Yammer is the company's "golden egg"

Microsoft details changes in Yammer pricing and future plans

Yammer co-founder: Microsoft is more like a startup

Microsoft-owned Yammer pushes out new update

Microsoft completes Yammer acquisition

Microsoft purchases Yammer for $1.2 billion

More rumors emerge on Microsoft-Yammer deal

Microsoft to buy Yammer for more than $1 billion

Microsoft shows interest in buying Yammer