Malicious URL protection in Teams

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Introduction

In a world where phishing attacks and malicious links are constantly on the rise, Microsoft is strengthening Microsoft Teams security with a native malicious URL protection feature. This new option helps detect, block, and report dangerous links shared in Teams conversations.

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How does it work ?

When a user sends a message containing a URL in a chat, channel, or meeting conversation, the URL is automatically analyzed using the Microsoft Defender threat intelligence database. If a dangerous link is detected, Teams displays a warning to the sender and all recipients of the conversation.

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How to enable it ?

This feature is still in Public Preview and requires an administrator to enable it, but it will be enabled by default once General Availability is available.

1. Log in to the Microsoft Teams Admin Center.
2. In the left menu, click Messaging, then Messaging settings, and enable the Scan messages for unsafe links option.
3. Save to apply the changes.

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Configuration in PowerShell

You can also configure the protection feature via the following PowerShell commands :

Connect-MicrosoftTeams

Set-CsTeamsMessagingConfiguration -Identity Global -UrlReputationCheck "Enabled"

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Conclusion

With malicious URL protection in Teams, Microsoft is strengthening its built-in security strategy within Microsoft 365. This feature allows organizations to better protect their users from online threats without compromising productivity or the collaboration experience. This is a critical step forward for securing communications in a hybrid work environment.

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Sources

Microsoft Learn - Malicious URL protection

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