Email remains a primary attack vector for cybercriminals, and Microsoft 365, despite its popularity, lacks comprehensive security. While Exchange Online Protection is included, it falls short by relying on static signatures, missing advanced anti-phishing, zero-day protection, and controls like SMTP policy management. The 2022 Verizon Data Breach Investigations Report found email was the entry point in one-third of breaches, leading to stolen credentials, ransomware, and phishing. Remote work has worsened the risk, with over two-thirds of Microsoft 365 users reporting more breaches compared to non-users. Organizations need additional layered email security to defend effectively.

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