Duo Push Authentication Guide - For UT San Antonio Faculty, Staff and Students
Duo Push makes authentication simple and reliable by using your mobile device to verify your login.
- Approve – Confirms your identity and grants access to the application.
- Deny – Blocks the login attempt, helping prevent unauthorized access.
Step 1: Initiate Authentication
- When logging into a Duo-protected application or service, select Duo Push as your authentication method.

- A login request will be sent to your registered mobile device.

Step 2: Respond to the Push Notification
- If the request is expected:
Tap Approve to authenticate successfully
- If the request is unexpected:
Tap Deny to reject the login attempt
Step 3: Handle Unexpected Requests
- After tapping Deny, you’ll be asked:
“Was this a suspicious login?”

- Tap Yes if you did not initiate the login and suspect fraud.
- Duo will:
- Silence all Duo Mobile notifications for 20 minutes
- Allow you to approve requests manually via the Duo Mobile app
- Send a Fraudulent Authentication Report email to Duo Admins
- Tap OK to continue to the Duo Mobile app.

- Tap No if the login was not suspicious (e.g., accidental request).
Step 4: Security Best Practices
- Denying a Duo Push has no negative implications.
- Marking a request as suspicious helps report fraudulent activity.
- Never respond to emails requesting your username, password, or phone number.
- Forward suspicious emails to Spam@uthscsa.edu or click the Phish button.
- Contact the Service Desk at 210-567-7777 opt 1 to verify legitimacy
Step 5: If Credentials Were Compromised