Microsoft Teams
Microsoft: Anti-phishing rules mistakenly blocked emails, Teams messages
Microsoft says an Exchange Online issue that mistakenly quarantined legitimate emails last week was triggered by faulty heuristic detection rules designed to block credential phishing campaigns. As Microsoft explains in a preliminary post-incident report published this week, a software error in its email security system incorrectly flagged thousands of legitimate URLs as phishing links for nearly a week, […]
Microsoft Teams outage affects users in United States, Europe
Microsoft is working to resolve an ongoing outage affecting Microsoft Teams users, causing delays and preventing some from accessing the service. According to user reports on the outage-tracking platform DownDetector, this ongoing incident is causing problems when joining meetings with the Teams desktop client, accessing the Teams app, and signing in. “Users may experience delays and failures when sending […]
New Microsoft Teams feature will let you report suspicious calls
Microsoft plans to introduce a call reporting feature in Teams by mid-March, allowing users to flag suspicious or unwanted calls as potential scams or phishing attempts. The new “Report a Call” function will be enabled by default, but administrators who want to disable the new security feature can toggle off “Report a Call” in the Teams […]
Microsoft Teams to add brand impersonation warnings to calls
Microsoft will soon add new fraud protection features to Teams calls, warning users about external callers who attempt to impersonate trusted organizations in social engineering attacks. Named “Brand Impersonation Protection,” the new Teams security feature will start rolling out to the targeted release ring in mid-February and will be enabled by default. According to Microsoft, […]
Zoom Stealer browser extensions harvest corporate meeting intelligence
A newly discovered campaign, which researchers call Zoom Stealer, is affecting 2.2 million Chrome, Firefox, and Microsoft Edge users through 18 extensions that collect online meeting-related data like URLs, IDs, topics, descriptions, and embedded passwords. Zoom Stealer is one of three browser extension campaigns that reached more than 7.8 million users over seven years and […]
Microsoft Teams to let admins block external users via Defender portal
Microsoft announced that security administrators will soon be able to block external users from sending messages, calls, or meeting invitations to members of their organization via Teams. The new feature will start rolling out in early January, integrating Microsoft Teams with Defender for Office 365, and enabling admins to manage blocked external contacts through the […]
Microsoft Teams strengthens messaging security by default in January
Microsoft announced that Teams will automatically enable messaging safety features by default to strengthen defenses against content tagged as malicious. The change will roll out starting January 12, 2026, to tenants still using the default configuration and who haven’t previously modified messaging safety settings. “We’re improving messaging security in Microsoft Teams by enabling key safety […]
Microsoft confirms Teams is down and messages are delayed
Microsoft Teams is experiencing issues, with thousands reporting problems sending messages, including delays. The outage started at 14:30PM ET, and it’s affecting users in all regions, including the United States and Europe. In a post on X, Microsoft confirmed it’s investigating an issue affecting Teams and will share an update soon. “We’re investigating an issue […]
Microsoft Teams to warn of suspicious traffic with external domains
Microsoft is working on a new Teams security feature that will analyze suspicious traffic with external domains to help IT administrators tackle potential security threats. As explained in a Microsoft 365 roadmap update this week, the “External Domains Anomalies Report” will help admins protect their organizations without disrupting legitimate business communications. The new tool will do […]
Microsoft is speeding up the Teams desktop client for Windows
Microsoft says it will add a new Teams call handler beginning in January 2026 to reduce launch times and boost call performance for the Windows desktop client. A new process, ms-teams_modulehost.exe, will be used after rollout to handle calling features under the primary ms-teams.exe app process, according to Microsoft. “We’re improving the performance and startup […]