Messageware Security Suite for Exchange Server is a collection of on-premises security software products designed to extend Microsoft Exchange Server with endpoint, session, logon, and in-application security capabilities for Outlook Web (OWA) and related Exchange services. The suite includes the following components: Z-Day Guard: A threat hunting module that monitors Microsoft Windows Servers for zero-day attacks. It provides detection, alerting, and response (MDR/MDAR) capabilities and is designed to remain active even when malicious software attempts to disable it. EPG Server Guard: A security module covering threat detection, intelligent banning, alerting, monitoring, and reporting for Microsoft Exchange Servers. It targets password attacks and Active Directory account lockouts across Exchange services including OWA, EWS, Autodiscover, and ActiveSync. AttachView: Controls data access within Outlook Web attachments by applying configurable restrictions on copy, print, and download actions, and prevents data from being left on insecure machines. OWA Guard: Secures the OWA authentication process using CAPTCHA and intelligent tar pitting to defend against logon and password attacks. It also provides real-time reporting and alerting on suspicious logon activity. NavGuard: Protects active Outlook Web sessions and confidential data from exposure when users navigate away from an active session to browse other sites. TimeGuard: Automatically terminates unattended Outlook Web sessions when users fail to log off or close the browser, preventing unauthorized access to open sessions.