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Duo FAQs

Can I change each device's name in Duo?

Yes! Log into a Duo online service (e.g., Online Toolkit). On the Duo screen, click My Settings and Devices. Next to the device that you’d like to change, click Device Options. Click Change Device Name. Enter a new name and click Save.

change name devices

Why am I being required to use Duo?

Unfortunately, individual passwords are compromised on a daily basis via email phishing attempts and other malicious activity. With Duo, it is not likely that an unauthorized user can supply both factors to access Texas State online services. Duo will increase the level of security for your account and the important Texas State confidential information stored within these services. To learn more about requirements and efforts to secure personal and confidential information, see UPPS 04.01.01 - Security of Texas State Information Resources

I received a phone call or push notice from Duo Security, but I’m not trying to log into any Duo online service. What should I do now?

First, hang up the phone. Secondly, contact ITAC immediately to research the issue.

On my Duo screen, I see this: Remember me for 24 hours. How does that work?

Often times, people log into the same service many times per day.

At first successful login for the day, you can select Remember me for 24 hours. For the next 24 hours, accessing the specific service from the same computer and Web browser will require only a NetID and password.

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I deleted the Duo Mobile app or had to restore my mobile device. I no longer have the Duo Mobile app. How do I get set up again with Duo Mobile and Duo?

If you delete your Duo Mobile app or restore your mobile device, go to your app store and install the Duo Mobile app once again. If you don’t see Texas State University as an option in your Duo Mobile app, log into a Duo online service, click My Devices and Settings, and enroll your phone and the app once again.

Learn more about how to install the Duo Mobile app.

I’m not receiving the Duo Mobile apps push notifications for Duo, what should I do?

Check your app settings to be sure that DUO push notifications are turned on. Otherwise, if you’d prefer leave notifications off, remember to open the Duo Mobile app every time you need to log into a Duo online service. If you still do not see a notification, uninstall then reinstall the Duo Mobile app.

Who is enabled to use Duo to log into Texas State online services?

All faculty, staff, and student employees are enabled to use Duo to log into Texas State online services.

What can I do if I need to log in with Duo, I don't have a mobile device enrolled, and I am away from my landline?

If you find yourself frequently needing to log into Duo online services while away from your office or home phone, here are two options that will allow you to use Duo on the go:

  • Enroll your mobile device to receive text messages or push messages via the Duo Mobile app.
  • Purchase a key fob hardware token that displays a unique passcode that changes frequently. Key fobs are available for departmental purchase at the ITAC Service Center.

If you are unable to do the above, contact ITAC for further assistance.

Which device types can I use for Duo?

You have the ability to enroll and manage the below device types for use with Duo:

  • Mobile Phone – push to Duo Mobile app or passcode via text message
  • Tablet or iPad – push to Duo Mobile app
  • Landline Phone – call to direct office or home telephone
  • Duo key Fob Hardware Token – displays a unique passcode (changes with each login)

It is highly recommended that you enroll more than one device (EXAMPLE: mobile phone and direct office phone line).

What should I do if I change my office telephone number but used it to log into a Duo online service?

Log into any Duo online service (e.g., Online Toolkit). When you see the Duo screen, click My Devices and Settings. Delete your old phone number. Then, click Add a new device, and add your new phone number.

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How is Duo login different from computer encryption?

Duo is a multi-factor authentication method that adds a layer of security for logging into to a select set of Texas State online services.

Computer encryption protects the data stored on computers and laptops. In some cases, data is also encrypted as it is transferred to cloud services.

I've enrolled multiple devices in Duo. Can I set it up to automatically use my preferred default device?

Yes! Log into a Duo online service (e.g., Online Toolkit). On the Duo screen, click My Settings and Devices. Select your preferred default device, and click the checkbox next to Automatically send me a:. In the future, your default device will automatically be contacted to complete the login process.

multiple devices

If my mobile device is not connected to the Internet, will the Duo Mobile app still work for Duo?

Yes! If you are not connected to the Internet, enter the one-time-use passcode located in the Duo Mobile app to complete the Duo process. 

NOTE: This passcode will change with each login attempt.

Open the Duo Mobile app. Next, to Texas State University, tap the green key to reveal the passcode.

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On your computer, at the Duo login screen, click Enter a Passcode, and enter the passcode displayed in your Duo Mobile app.
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What is Duo and multi-factor authentication?

Multi-factor authentication (MFA) is security beyond the password and adds an additional layer of protection to Texas State online services.

Duo is Texas State's two-factor authentication method used for logging into select online services. Duo requires two factors for successful access:

  • something a user knows (NetID and password)
  • something a user has (mobile device app, phone, or key fob token)


Will I receive spam calls/notifications if I use my personal phone for Duo?

No. The university will only use the information provided for the Duo process.

I have a new phone. How do I set it up to use Duo?

See How to Enroll my Mobile Phone Device.

Can I enroll more than one landline in Duo?

Yes! Actually, ITAC highly recommends that you enroll multiple devices (home and direct office phone lines included).

CAUTION: Be sure that the landline device which you enroll is your direct line. Do not enroll general department or main phone numbers.

What's the difference between my NetID and Duo?

Your NetID and password give you access to most Texas State online services. Many online service require an additional layer of protection beyond the password. This is called Duo

Duo is a multi-factor authentication system used for accessing online services at Texas State.

Duo requires two factors for successful access:

  • something you know (NetID and password)
  • something you have (mobile device, landline phone, or key fob

Am I required to use my personal mobile device for Duo, or are there other options?

While it is recommended that you enroll your mobile device and use the Duo Mobile app for Duo login, it is not required.

Below are alternative devices. You are encouraged to enroll more than one device and/or device type:

  • tablet or iPad – pushes to Duo Mobile app
  • landline phone – call to direct office line or home telephone
  • Duo key fob hardware token* – displays a unique, passcode (changes with each login)

*Key fobs require departmental or personal purchase from ITAC. One key fob per user.

What should I do if I lose my mobile device and can’t log into Duo?

If you lose your phone, or any other mobile device enrolled Duo, choose one of these options:

If you have another device enrolled (e.g., your direct office line), log into a Duo online service (e.g., Online Toolkit). Click My Settings and Devices. Next to your mobile device, click Device Options, and click the trash can to delete that device.

If you do not have any other devices enrolled in Duo, contact ITAC who will be happy to assist with helping to resolve the issue.

lost device fix