Why Microsoft bought LinkedIn for 26 billion, in one word: Cortana

The image above says it all: Microsoft spent 26.1 billion to ensure that you'll never walk into a meeting "cold" again. A good salesperson knows his or her contacts before he or she steps foot in the door. But that goes for coworkers as well: How you you make them feel comfortable? How do you make them part of a team? How do you let them know who to approach, both inside and outside the company?