Steps to be performed on the VPN device :
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On the PCS device, need to enabled the Touch ID authentication on the following location :
1.Navigation: System > Configuration > Mobile > Touch Id Support for iOS devices > Enable Touch id for user authentication -- Save the Changes
On the IOS device:
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1. On the Pulse Secure Mobile Client : Add the user Sign-in URL -- Save the Connection Set
2. At this point under the connection set, you will notice the touch ID option is disabled on the bottom right corner.(Do not worry about it)
3. Connect to the Sign-in URL that you have added, First time it will ask the user credential -- Input the credentials and Click on Sign in -- You will get a popup with "Touch id" Prompt. Click yes for using touch ID and you will be connected successfully.
5.The Second time you connect -- you will be directly prompted with the Touch ID Prompt -- Place ur Finger and get the VPN access

Note : 8.2R3 has been released out on Monday