Microsoft Office 365 has 250 million active users each month, which has made it a historically consistent target for attacks. Many of those users are currently working from home due to COVID-19 restrictions, often on networks that don t have the same protections as the corporate cloud. The report takes a dive into some of the most popular ways that attackers leverage Office 365 services and tools to compromise corporate networks. Researchers observed in 96 percent of the 4 million Office 365 customers sampled between June to August 2020.
Source: https://threatpost.com/office-365-persistent-cyberattacks/160010/