1. Log into the Duo Portal.

2. Click "Sign in to activate Duo now."

3. Select an authentication method to access Duo Portal.

4. Once you are able to authenticate, you will be taken to the "Manage Duo Devices" page where you can add or remove devices.

5. Under "My Settings and Devices," click on "+Add another device."

6. Follow the steps accordingly to add a new device.

1. Log into the Duo Portal.

2. Click "Sign in to activate Duo now."

3. Select an authentication method to access Duo Portal.

4. Once you are able to authenticate, you will be taken to the "Manage Duo Devices" page where you can add or remove devices.

5. Under "My Settings and Devices," click on "Device Options" for the device you are removing.

6. Click the trash bin icon to remove the device.

Step-by-step instructions are provided here.

Since Duo Mobile is tied to a specific device's hardware security module (HSM), you will need to reactivate Duo Mobile on your device by logging into the Duo Portal.

For Duo MFA User Support, please visit the following:

For Faculty and Staff

• Information Technology User Services (ITUS) Help Desk - Faculty and staff can get help from your department IT support staff or ITUS at 619-594-5261. ITUS will offer extended hours, and staffing, during the week of March 5th from 8 am to 5 pm.

• Submit a Ticket - If you are having problems, please submit a ticket through SDSU ServiceNow.

• Virtual FIT Center - Any faculty, staff, or student employee with a question or need of immediate assistance can visit the Virtual FIT Center at http://sdsu.zoom.us/my/sdsuits, M-Th, 8 am to 5 pm, and Friday 8 am to 4:30 pm.

For Students

• Hub Help Desk - For student support, please contact the Hub Help Desk by phone at 619-594-3189, email at [email protected], or chat at library.sdsu.edu/askhub.

If you set up a backup device, you can use the secondary device to authenticate with.

If you generated Duo Bypass Codes, you can authenticate with bypass codes. Step-by-step instructions for generating Bypass Codes are provided.

Otherwise, if you do not have a backup device and did not generate Duo Bypass Codes, please contact Help Desk. Help Desk administrators will be able to provide a one-time use code that you can use to authenticate your identity.

For Duo MFA User Support, please visit the following:

For Faculty and Staff

• Information Technology User Services (ITUS) Help Desk - Faculty and staff can get help from your department IT support staff or ITUS at 619-594-5261. ITUS will offer extended hours, and staffing, during the week of March 5th from 8 am to 5 pm.

• Submit a Ticket - If you are having problems, please submit a ticket through SDSU ServiceNow.

• Virtual FIT Center - Any faculty, staff, or student employee with a question or need of immediate assistance can visit the Virtual FIT Center at http://sdsu.zoom.us/my/sdsuits, M-Th, 8 am to 5 pm, and Friday 8 am to 4:30 pm.

For Students

• Hub Help Desk - For student support, please contact the

Already applied? Review your next steps. Go to my.sdsu to keep informed of the current status of your application and admission.

An updated version of the Duo Mobile app was released for iOS and Android phones on Monday, Oct. 11. The Duo MFA authentication approval prompt has a new look!

What’s different in the new version? 

The Duo Mobile app has been redesigned to improve the login experience by:

• Landscape View. The new user interface now includes a landscape view, variable font sizes, and improved color contrast.
• End-user Support. The redesigned Duo Mobile app provides a new Call-to-Action area that guides users to self-remediate when they are in a known error state. 
• Simpler Interface. The user interface makes it easier to find and manage your accounts with a simpler interface. 
• Updated Approve/Deny Buttons, The position of the Approve / Deny buttons have been switched so that the  button is now on the right, which is a more natural location (see image below).

Old and New Duo Mobile Multi-factor Authentication Prompts

When the redesigned Duo Mobile launches, will I need to do anything?

It depends. If you’ve enabled automatic app updates on your device, Duo Mobile will update automatically. You can also manually update Duo Mobile from the Apple App Store or Google Play Store. 

An unexpected MFA request is one you receive that was initiated by someone else trying to sign in as you. This could mean that your SDSUid username and password have been compromised. You should change your password immediately by going through the SDSUid Password change process.

Stay vigilant and only approve MFA requests you initiate yourself, knowingly and intentionally.

Depending on the authentication method, if you suspect you are receiving a fraudulent MFA request, hang up, deny the request, or do not enter the provided passcode. Then, report the fraudulent attempt IMMEDIATELY to [email protected].

Using the Duo Mobile app, Duo PUSH is convenient and fast. In addition, it is more secure than a phone call or SMS text message because it provides end-to-end encryption and displays detailed information about the application and source device that initiated the authentication request. Learn more about Duo PUSH.

A hardware token is a small, battery-powered device that you can attach to a keychain. Pressing a button on the token generates a code on the built-in display. Please note the hardware token does not require cellular or internet service to receive Duo-generated passcodes.

For faculty and staff requesting a Duo token, create a ticket using SDSU ServiceNow.

For students requesting a Duo token, please contact the Library Computing Hub Help Desk by phone at 619-594-3189, email at [email protected], or chat at library.sdsu.edu/askhub. **Note: It is recommended that students provide an additional email address (non-SDSU) on the ServiceNow ticket to ensure that notifications are received.**

Duo tokens are distributed at the SDSU Library Circulation Desk. You will receive a notification through the ServiceNow ticket when the token is ready for pickup.