The migration of email infrastructure from on-premises to the cloud has accelerated to the extent that by 2021, 70% of public and private organizations will use cloud email services (Gartner, Market Guide for Email Security, 2019.) Microsoft 365 is the predominant office suite. Because email is vulnerable to advanced threats, Gartner recommends adding cloud email supplemental security to protect cloud mailboxes with layered security and diversified threat intelligence. Cisco Cloud Mailbox– integrated email security for Microsoft 365, protects your organization against the number one threat vector: Email.