As the size of your organization increases, the probability that an individual employees company email is in that breach rises to 1. That lone employee is going to be suffering some unfortunate impacts, from identity theft, financial scams, blackmail, and even death threats. A single compromised account can serve as a launching point for reconnaissance, phishing waves, or a pivot point for a further attack. So how do you go about plugging leaks? A three-point strategy can get you started.”]
Source: https://blog.malwarebytes.com/101/2017/02/why-do-i-care-about-someone-elses-data-breach/