4.4

MetaDefender for Microsoft 365 is an advanced solution that bolsters Microsoft 365’s native defenses with industry-leading threat prevention for email, files shared through Microsoft Teams and files uploaded to OneDrive and SharePoint. 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, Deep CDR™ (Content Disarm & Reconstruction) for proactive content sanitization and the OPSWAT AI Content Inspector for detecting AI generated content in images and text. 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

• [Available upon request] AI Content Detection: AI-generated text and images are labeled AI Content or Possible AI Content. Request feature through the OPSWAT Support Portal.

• Protected new SharePoint sites, subsites and libraries and new OneDrive users covered by the saved scope automatically

• Added a CSV export of the audit log from the Audit page

• Added a default notification template for files with an Invalid File Structure verdict.

• Geo Location Allowed and Threat counts on the dashboard

• Redesigned how the OTP page shows the email content

Bugs

• Fixed admin and user quarantine reports not being sent

• Fixed forwarded meeting invites arriving as plain emails after the banner icon was added

• Fixed no notification being sent when a rescan quarantines an email or file again

• Fixed sanitized Teams, SharePoint and OneDrive files ignoring the policy's file name template

• Fixed Teams releases missing from the released counters in statistics

• Fixed Event Details not showing the Signed and Encrypted labels shown in the Events list