For almost every company, Office 365 is the initial cloud service deployed across the organization. It has kept evolving with the trend focusing on increased productivity, feature dimensions, and security tools for all users. But at the same time, the far-flung nature of Office 365 has sprouted many bottlenecks in the security line of organizations. And there is a proper need to address those threats. Security service intended to address these threats and protect the functionality is known as Office 365 Security.