On: Safe Links checks a list of known, malicious links when users click links in Microsoft Teams. URLs are not rewritten.: Select this option to enable Safe Links protection for links in Teams. This setting might take up to 24 hours to take effect. This setting affects time of click protection.

Teams data is encrypted in transit and at rest in Microsoft data centers using industry standard technologies such as TLS and SRTP. This includes calling, messages, files, meetings, and other content. See Encryption for Teams for details. Can I use E2EE for group meetings and calls?

Researchers found a bug allowing communication between Microsoft Teams users in different organizations. Exploits include phishing schemes and malware delivery. Mitigation involves setting up external communication restrictions, domain allow-listing, employee education, and regular security audits.

Teams uses TLS and MTLS to encrypt instant messages. All server-to-server traffic requires MTLS, regardless of whether the traffic is confined to the internal network or crosses the internal network perimeter.