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This article shows the process of installing the Global Protect VPN on your personal iOS device so that you can access TU resources while travelling.
Download the Global Protect app:

Enter the portal address: "travelvpn.utulsa.edu"

Tap Allow:

Enter your TUNetID and password as normal:

The app should appear like this when connected:

Once you are connected, you will then be able to access your email and other TU Resources.