What about VPN-protected apps?
Unfortunately, online usability tests are unmoderated and do not support apps that are protected by your VPN Network.
If you have an app that can be accessed only via VPN, we recommend you do moderated testing using phone calls or personal meetings.
On the phone call you can set up screen-sharing and give the tester control during usability testing. During personal meetings you can show your prototype on your computer and let the tester test it there.