Office 365 is a common target to attackers because it is a popular cloud-based platform that is used by many organizations. Remote work popularized cloud platforms and enterprises began to rely more on cloud solutions, such as Office 365. Office 365 is a large, complex system that is constantly evolving, making it difficult to secure and manage.
Common attacks against Office 365 include phishing attacks, where attackers use malicious emails to trick users into revealing sensitive information or downloading malicious software, or brute force, where attackers use automated tools to guess passwords and gain access to accounts.
After gaining an initial access to the systems, attackers can deploy a wide range of payloads, including BEC, data exfiltration, malware or various destructive attacks.
This guide goes in-depth into defending the Office 365 using built-in security features and policies and describe ways to detect security incidents within the system and respond to them using built-in tools and policies.