If a client certificate is required during authentication, you are automatically prompted to select a client certificate from the Android device client certificate store.
Choose certificate
Select the client certificate from the list of certificates and tap Allow.
By default, a VPN connection prompts you to select the client certificate during authentication. If you successfully authenticate with a client certificate, the VPN connection profile is automatically updated to use the client certificate for each subsequent connection attempt.
To reset the client certificate selection, edit the connection and tap the Forget Selections button.
If no client certificates are installed, an Android No certificates found dialog appears with an option to install a PKCS#12 file located in external storage.
No certificates found