DUO FAQs and Troubleshoot

Two-Factor Authentication (2FA) adds a second level of security during the login process to help prevent anyone other than you from accessing systems storing sensitive data. This is accomplished using 2 layers of security to verify your identity when logging into a system:

1. Enter your username (your MyMC ID) with your password
2. Use a physical device such as your cell phone, tablet, or landline phone to confirm your identity

The device that is most convenient for this purpose is a cell phone with the Duo Mobile app installed on it. Alternatively, a text message can be sent with a one-time passcode for you to type in.

MyMC, Microsoft 365 (M365) email, OneDrive, Virtual Private Network (VPN) and other select single sign-on (SSO) applications and online services such as Adobe, IT Service Desk, TMA (facilities), ADAstra, MiniTab, and MC Academic calendar (provided by Dude Solutions).

Once you access an application or service protected by 2FA you will enter your login credentials (username and password) and then be prompted for 2FA.

Duo Push
Offered by the Duo Mobile app installed on your mobile device. When logging to a 2FA protected application you will receive an authentication request on your Duo Mobile app. You will “tap” Approve, or Deny if you are not the one attempting to authenticate. Once you “Approve” you will gain access to the application or system.

Passcode from Duo Mobile app or SMS Passcodes
You may choose “Duo Mobile passcode” from the Duo Mobile app and enter the Passcode to authenticate or choose “Text message passcode” and enter the Passcode you receive via SMS.

Security Keys
Security keys such as, YubiKey, may be used to authenticate. The device is inserted into your USB port and the user “taps” the device to approve the authentication.

Hardware Tokens
Hardware tokens are available to users who do not have a mobile device. Please contact the IT Service Desk as needed.

Yes. It is recommended that you register more than one device, in case you lose the primary one.

Each time you authenticate to a Duo enabled application, i.e. MyMC, M365, or VPN, you will be prompted to authenticate with 2FA. However, you may select the “Yes, trust browser” option to skip Duo authentication for 7 days for the application when you login again with the same browser and device.

Note: Do not trust the browser when using a public or shared computer! This could leave your application/session available to other users.

You can manage your devices by visiting the MC Device Management Portal. The system will prompt you to authenticate first and then you may choose to edit the existing device or add a new device.