Enforcing multi-factor authentication requires all users in your team to have an additional authentication method alongside their passwords, such as an authenticator app, SMS, or a password manager. Here's how:
1. Navigate to your Team Settings from the drop-down menu in the header menu bar
2. Scroll down to "Security" in the first "Settings" tab
3. Enable "Enforce 2-factor authentication for all users"
4. Press "Update team"