---
title: "Log in: 12d Synergy Web App with Two-factor Authentication"
slug: "login-12d-synergy-web-app-with-two-factor-authentication"
updated: 2026-05-28T06:27:26Z
published: 2026-05-28T06:27:26Z
---

> ## Documentation Index
> Fetch the complete documentation index at: https://help.12dsynergy.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Log in: 12d Synergy Web App with Two-factor Authentication

### 1.1. How to Register a Secondary Device

If you are logging in to the 12d Synergy Web App for the first time after the 12d Synergy Administrator has selected a **secondary device as a mode for two-factor authentication**, do the following:

1. Log in to **12d Synergy Web App**. The **Register device** dialog box is displayed. ![](https://cdn.document360.io/36833d89-59e3-46a5-b491-e9aa1b524a85/Images/Documentation/regdev(1).png)
2. Open the Authenticator application on your mobile device and scan the QR code on the monitor, or use the secret code using the **Show Code**option to register your device as a secondary device. The 12d Synergy one-time password (OTP) is added to the Authenticator home page.
3. Click the **Next** button. The **Approve this Sign In** dialog box is displayed.
4. [Continue to log in to the application](/v1/docs/login-12d-synergy-web-app-with-two-factor-authentication#12-how-to-login-to-12d-synergy-web-app-with-twofactor-authentication).

If you want to change your registered secondary device, please contact your 12d Synergy Administrator.

### 1.2. How to Log in to 12d Synergy Web App with Two-factor Authentication

- You can log in to the **12d Synergy Web**application using one of the following three [modes of authentication](https://help.12dsynergy.com/docs/user-authentication). The login process depends on the authentication mode you select.
  - Windows Authentication
  - Custom Authentication
  - Single Sign On
- Two-factor authentication is NOT applicable to [SSO users](https://help.12dsynergy.com/docs/user-authentication).

- If your 12d Synergy Administrator has selected / re-selected a **secondary device as a mode for two-factor authentication**, do the following:
  1. Log in to **12d Synergy Client**. The **Approve this Sign In** dialog box is displayed. ![](https://cdn.document360.io/36833d89-59e3-46a5-b491-e9aa1b524a85/Images/Documentation/approve1.png)
  2. Enter the six-digit OTP displayed in the **Authenticator**application in the **Code** box.
  3. Select the **Remember me**check box to enable the system to log in without an OTP for a set period. The duration your authentication can be remembered is set by the 12d Synergy Administrator in the **12d Synergy Administration**application. If not set, it defaults to 30 days.
  4. Click the **Approve** button. If the entered OTP is correct, then you are successfully logged into the Web App.
- If your 12d Synergy Administrator has selected / re-selected **email as a mode for two-factor authentication**, do the following:
  1. Open any of the supported browsers and type the **12d Synergy Mobile App** link provided by your 12d Synergy Administrator****in the address bar and press the **Enter** key. The login dialog box is displayed.

![](https://cdn.document360.io/36833d89-59e3-46a5-b491-e9aa1b524a85/Images/Documentation/remmeweb2fa.jpg)

| **Supported Browsers** |
| --- |
| Safari |
| Mozilla Firefox |
| Microsoft Edge |
| Google Chrome |
  2. Enter your username and password in the **Username** and **Password** fields.
  3. Click the **Login** button. The username and password are verified and the **Approve this Sign In** dialog box is displayed. ![](https://cdn.document360.io/36833d89-59e3-46a5-b491-e9aa1b524a85/Images/Documentation/approveemail(1).png)
  4. Enter the six-digit OTP sent to your email address in the **Code** box.

If you have not received your OTP email in your inbox, check your junk or spam folder. If you still cannot find it, then click the **Resend** button in the **Approve this Sign in window** to get a new OTP.
  5. Select the **Remember me**check box to enable the system to log in without an OTP for a set period. The duration your authentication can be remembered is set by the 12d Synergy Administrator in the**12d Synergy Administration** application. If not set, it defaults to 30 days.

If you do NOT select the **Remember me** check box, then after four hours of your last login to the 12d Synergy Web app on the same system, you will be prompted for an OTP every time you log in thereafter.
  6. Click the **Approve** button. If the entered OTP is correct, then you are successfully logged into the Web App.