4.2

MetaDefender for Microsoft 365 is an advanced solution that bolsters Microsoft 365’s native defenses with industry-leading threat prevention for email and files shared through Microsoft Teams. It is purpose-built to detect and neutralize malware, zero-day exploits, and embedded file-based threats, helping protect users across email and collaboration workflows.

This solution is powered by OPSWAT’s Metascan™ Multiscanning, adding more AV (antivirus) engines, MetaDefender Aether Sandbox for advanced dynamic threat analysis, and Deep CDR™ (Content Disarm & Reconstruction) for proactive content sanitization. By combining signature-based detection, behavioral sandboxing, and content sanitization, protection extends beyond traditional defenses to identify and neutralize both known and zero-day threats. With multiple layers of proactive protection and advanced technologies designed to combat evolving attack techniques, the solution deploys rapidly and integrates seamlessly with Microsoft 365, minimizing disruption to mail flow and Teams collaboration.

Enhancements

• Added email header sanitization options.

• Added automatic extraction of attachment passwords from the message text in six languages, with retry of encrypted files

• Added a optional AI fallback for attachment passwords the pattern-based extraction misses

• Turned the dashboard Action Items card into a "Needs your attention" carousel

• Defaulted the dashboard timeframe to Last 30 days

Bugs

• Fixed Teams channel posts being discarded as out of scope under a custom Group protection scope

• Fixed the Teams OTP page ignoring the policy's end-user release and rescan permissions

• Fixed the missing "integration created" entry in recent activity

• Fixed the wrong View User Role path from Audit

• Corrected the policy "Other Technologies" card to stop promising verdicts that cannot occur with CDR and Multiscanning disabled

• Fixed the "Failed to deliver" label being cut off in the Event list and word wrap in dashboard cards