Restrict anonymous meeting join

If anonymous users can join Teams meetings AND auto-bypass the lobby, attackers can silently join scheduled meetings using only the meeting link — which routinely leaks via calendar invites, support tickets, and screenshots. They can then record audio/video and read chat.

A scan reports where your tenant stands on this check — pass, fail with a step-by-step fix, or not applicable if your licensing doesn’t include the feature. When Tenant Strike can’t read a setting with read-only access, it says unverified and gives you a one-command way to confirm it yourself — it never guesses.