A typical enterprise uses many applications, many or most of which are not designed to work with one another out of the box. Integrating separate but related apps helps organizations achieve greater levels of operational consistency, efficiency, and quality.
The two companies are building on their already fruitful partnership by integrating Lightning Components into Microsoft’s Outlook software on web and desktop.
Microsoft's Outlook.com is used by some 400 million users around the world, so it's only natural that Salesforce wants its own software to play nicely with it. The CRM giant announced a big step in that direction.