Near real-time URL protection in Teams messages:

September 2025

• Near real-time URL protection in Teams messages: Known, malicious URLs in Teams messages are delivered with a warning. Messages found to contain malicious URLs up to 48 hours after delivery also receive a warning. The warning is added to messages in internal and external chats and channels for all URL verdicts (not just malware or high confidence phishing).
• Users can report external and intra-org Microsoft Teams messages as non-malicious (not a security risk) from the following locations:

1. Chats
2. Standard, shared, and private channels
3. Meeting conversations
   User reported settings determine whether reported messages are sent to the specified reporting mailbox, to Microsoft, or both.