Samsung GALAXY S7 EDGE User Manual page 226

You can get this information from your network administrator.
Before you can initiate a VPN connection, your phone must first establish a Wi-Fi or data connection.
For information about setting up and using these connections on your phone, see Browser and Turn
Wi-Fi On and Connect to a Wireless Network.
Set Up Secure Credential Storage
If your network administrator instructs you to download and install security certificates, you must first
set up the phone's secure credential storage before setting up a VPN.
1. From home, tap Apps
2. Tap Screen lock type > Pattern, PIN, Password, or Fingerprints.
3. Enter a new password (at least eight characters without any spaces) for the credential storage,
scroll down and confirm the password, and then tap OK.
The password is set, allowing secure credential storage.
4. Tap Back
to return to the main settings menu, and then tap Other security settings.
Settings Connections Settings
> Settings > Lock screen and security .
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