Open Settings → Connections / Network & Internet → Wi-Fi
Tap the Wi-Fi network name (eg. Company-Wifi)

Fill in the Username and Password as per given to you.
Click on CA Certificate and select the "Don't Validate" or "Trust on First Use " option

Then connect to the Wifi and you will be connected.
Was this article helpful?
That’s Great!
Thank you for your feedback
Sorry! We couldn't be helpful
Thank you for your feedback
Feedback sent
We appreciate your effort and will try to fix the article