2FA code required at every sign-in

MSStateDawg

TeamViewer requires me to enter the 2FA code EVERY. TIME. I. SIGN. IN.

Since the architecture is built around having to trust devices, why does TeamViewer not trust my machine at least for 90 days or such? Why the 2FA requirement at every sign-in?

SophE

Hi @MSStateDawg,

Thanks for bringing this up!

When two‑factor authentication (2FA) is enabled on your TeamViewer account, it replaces the trusted devices mechanism entirely. That’s why you're asked for a 2FA code every time you sign in, even on the same machine.

In other words:

• With 2FA enabled, TeamViewer does not trust devices in the long term. Each sign‑in always requires the second factor (e.g., an authenticator app code).
  
• Without 2FA enabled, TeamViewer falls back to trusted devices, where you confirm a device once via email and can then reuse it without repeated prompts. (Note: The trust in a device will be lost when cookies are deleted.)

You can choose the approach that best fits your workflow:

• Keep 2FA enabled: Highest security, but requires entering a 2FA code at every sign‑in.
• Disable 2FA: Trusted devices are used again, and you'll receive trusted‑device confirmation emails instead of 2FA prompts.

You can find more details on both options here:

Two-Factor Authentication | TeamViewer

Trusted Devices | TeamViewer

Let us know how you plan to proceed, and feel free to reach out anytime if you have any follow-up questions. We're here to help!

Best regards,
Sophia