1. Open a web browser, then enter the portal address htps://horizon.nsu.edu/.
2. Enter your NSU email address, then click “Next”.
![Click to View Full Image Uploaded Image (Thumbnail)](https://tdx.nsu.edu/TDPortal/Images/Viewer?fileName=f3978745-56a8-4ed3-a262-e06fcbf6350f-thumb.jpg&beidInt=2)
3. Enter your password, then click “Sign in”.
![Click to View Full Image Uploaded Image (Thumbnail)](https://tdx.nsu.edu/TDPortal/Images/Viewer?fileName=3c623633-0eb7-4805-ae49-a22c292ee074-thumb.jpg&beidInt=2)
4. New users will be greeted by a welcome screen. On the welcome screen click “Get Started”.
![Click to View Full Image Uploaded Image (Thumbnail)](https://tdx.nsu.edu/TDPortal/Images/Viewer?fileName=b907762e-6187-47c6-89b6-5958205d45a9-thumb.jpg&beidInt=2)
5. Select "Duo Mobile".
![Click to View Full Image Uploaded Image (Thumbnail)](https://tdx.nsu.edu/TDPortal/Images/Viewer?fileName=0017b590-9e05-41aa-86f5-380a1865183d-thumb.jpg&beidInt=2)
6. Enter your cell phone number, then click “Continue”.
![Click to View Full Image Uploaded Image (Thumbnail)](https://tdx.nsu.edu/TDPortal/Images/Viewer?fileName=6c8f3a7c-75b1-48d0-ab92-134a7506021d-thumb.jpg&beidInt=2)
7. Verify your cell phone number is correct, then click “Yes, it’s correct”.
![Click to View Full Image Uploaded Image (Thumbnail)](https://tdx.nsu.edu/TDPortal/Images/Viewer?fileName=5ff76040-beeb-41c1-8875-d627f1bca93d-thumb.jpg&beidInt=2)
8. From your mobile device, download the Duo app from the Apple App Store or Google Play Store, then click “Next”.
![Click to View Full Image Uploaded Image (Thumbnail)](https://tdx.nsu.edu/TDPortal/Images/Viewer?fileName=0e80531d-af91-4958-9546-1d13853508d9-thumb.jpg&beidInt=2)
9. From your mobile device, open the Duo app and select Use QR code, then scan the code with your mobile device.
![Click to View Full Image Uploaded Image (Thumbnail)](https://tdx.nsu.edu/TDPortal/Images/Viewer?fileName=8bc11e88-79fe-4275-92b0-ef2db7cbdafa-thumb.jpg&beidInt=2)
10. Click “Continue”.
![Click to View Full Image Uploaded Image (Thumbnail)](https://tdx.nsu.edu/TDPortal/Images/Viewer?fileName=6891cb3b-ebd5-470a-aa6b-d8361d6d7950-thumb.jpg&beidInt=2)
11. Click “Skip for now”.
![Click to View Full Image Uploaded Image (Thumbnail)](https://tdx.nsu.edu/TDPortal/Images/Viewer?fileName=eadc0055-6829-45e5-8c1f-aa64b92ec191-thumb.jpg&beidInt=2)