Attacks that target software-as-a-service (SaaS) user accounts are one of the fastest-growing and most prevalent problems for organizations, even before COVID-19 forced the vast and rapid shift to remote work. With many organizations increasing their cloud software usage, Microsoft has dominated the productivity space, with more than 250 million active users each month. Office 365 is the foundation of enterprise data sharing, storage, and communication for many of those users, making it an incredibly rich treasure trove for attackers, says the report.