Case Study: Mitsubishi UFJ Morgan Stanley PB Securities achieves stronger protection against targeted email attacks with Trend Micro Cloud App Security

Protecting One of Japan’s Largest Private Banks against Targeted Email Attacks

Mitsubishi UFJ Morgan Stanley PB Securities, a major Japanese private bank supporting corporate and high‑net‑worth clients through 280+ financial advisers, migrated its IT to Microsoft Office 365 and equipped staff with mobile devices. As targeted email attacks rose, the company created a CSIRT and sought stronger email defenses—beyond Exchange Online Protection—specifically looking for sandboxing and better detection of sophisticated phishing and malware.

They deployed Trend Micro Cloud App Security integrated with Exchange Online via APIs, which quarantines high‑risk messages, notifies the CSIRT, and enables mailbox investigation and automated user management through Active Directory. The solution was quick to implement, produced few false positives (only one message flagged as high risk to date), improved operational efficiency with an intuitive dashboard for at‑a‑glance monitoring, and the company plans to extend protection to SharePoint Online.

Mitsubishi UFJ Morgan Stanley PB Securities

Minoru Sakuma

Vice President Technology