How does Abnormal detect threats in Microsoft Teams?

Abnormal uses the same behavioral AI that protects email to analyze Teams messages. The platform inspects URLs and attachments in 1:1 chats, group chats, and channel posts, detecting malicious content that native Teams security misses.

What happens when a threat is detected?

Based on your configured policies, Abnormal can automatically block malicious messages or mark them for review. You can also manually remediate directly from the Abnormal portal. All actions are logged for compliance.

Does this require changes to my Teams configuration?

No. Abnormal integrates via API with no changes to your Microsoft Teams setup. Deployment takes minutes, and protection begins immediately.

How does this work with my existing email security?

Messaging Security extends your Abnormal email protection to Teams. All detections—email and Teams—appear in a unified Threat Log, giving your team one place to investigate and respond.

What types of Teams threats does Abnormal catch?

Abnormal detects malicious links, credential phishing attempts, malware attachments, and social engineering attacks delivered through Teams. This includes threats from external guests and compromised internal accounts.

Messaging Security

Stop Collaboration Threats Native Controls Miss

Messaging Security scans Microsoft Teams and Slack chats and channels for malicious URLs and weaponized attachments, auto-remediating high-risk messages and surfacing every threat to close the inspection gaps native tools leave behind.

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Of all phishing alerts originated from collaboration tools, up 30% from the prior four months

Palo Alto Networks 2026

320 million monthly active users on Microsoft Teams.

Microsoft

See It In Action

The Challenge

Collaboration Apps Are a Second Inbox — and a Blind Spot

Attackers exploit gaps in native protections

It can take hours to days to detect malicious attachments, leaving a gap attackers exploit for lateral movement and credential theft.

Threats are hard to see and contain

Native controls leave security teams with limited visibility, delayed containment, and manual investigations.

Email and collaboration are investigated separately

When a threat spans channels, analysts pivot between separate tools to investigate, fragmenting response and slowing containment of cross-channel attacks.

Why Abnormal

Immediate Teams and Slack Inspection, Unified with Email

Abnormal inspects every message and unifies the response.

Continuous API-Native Inspection

Built on API-native integrations with Microsoft 365 and Slack, Messaging Security inspects both in near real time and auto-remediates malicious messages without disrupting users.

Unified Cross-Channel Threat Log

Teams and Slack detections appear alongside email threats in one Threat Log, so analysts investigate cross-channel attacks without hunting across tools.

See What Makes Abnormal Unique

Built for Collaboration Security

Investigate and Remediate Cross-Channel Threats in One Place

URL and File Inspection

Monitors Teams chats and channels, and Slack channels, DMs, and threads, for suspicious URLs and high-risk attachments in near real time.

Automated Remediation

Uses admin-defined policies to block or safelist malicious messages: Teams messages are blocked with optional sender override-with-justification; Slack messages are tombstoned (replaced with a placeholder), with a one-time safelist reversal to correct a false positive.

Zero-Persistence Attachment Scanning

Scans Teams and Slack file attachments inline for high-risk file types using a zero-persistence architecture that processes files in memory without storing them.

Security on Autopilot

Abnormal’s autopilot extends from email into Teams and Slack — auto-remediating malicious messages, firing high-severity alerts, and surfacing everything in one Threat Log.

Remediate Threats Your Way

Customize remediation policies for Teams and Slack messages by threat type and per-tenant.

Over 25% of the Fortune 500 Trust Abnormal AI to Make Automated, Critical Security Decisions

Customer Voice

What Security Leaders Say

“Abnormal's automation gives our analysts time back to work on other projects, and the fact that it's API-based gives us flexibility to tie in other applications and their data.”

John Roeser

Senior Manager, Information Security, Domino's

“Our goals are to get away from being so reliant on human judgment and leverage AI to be proactive. Abnormal helps us with those goals.”

Corey Kaemming

Senior Director, Information Security, Valvoline

Abnormal powers over 4,500 customers, including over 25% of the Fortune 500.

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