And Microsoft didn't only want Yammer to help its customers; it wanted to get the benefits of an enterprise social network for itself, and to learn how to build cloud services at cloud speed.

In March, Microsoft will update the Communities app for Outlook and Yammer mobile apps for iOS and Android under the Viva Engage brand. Further elements of the rebrand will occur through 2023.

REDMOND, Wash., and SAN FRANCISCO — June 25, 2012 — Microsoft Corp. and Yammer Inc. today announced that they have entered into a definitive agreement under which Microsoft will acquire Yammer, a ...

Microsoft just paid $1.2 billion for Yammer. But it still plans on giving away the company's social-networking service for free. At least, that's the word from David Sacks, the CEO of Yammer, a ...