To activate the two-factor authentication account-wide, proceed as follows.
1. Navigate to the basic settings
2. Menu item: “Security”
3. Activate “Two-factor authentication
4. Confirm by clicking on “Update”
After that:
The next time your employees log in, they will be prompted to register with an Authenticator app. Thus, all accesses are secured with two-factor authentication (2FA). Tip: For secure access via an authenticator app, the Google Authenticator app can be used, for example.