The links you provided does not deal with info.plist way. Adding SSL Info in info.plist does not deal with having .cer or .pem file included in the app.

Edit: All my text formatting is gone. Hello Scott, As for the alert - it is internal app for Devs, Leads, Sr. Technical Staff. They understand that they need to update the app. Or, I can just show relevant message. I understand what you mentioned regarding urlSession(_:didReceive:completionHandler:). But I cannot read Error object to be able to read the error code -1200 and the error message An SSL error has occurred and a secure connection to the server cannot be made.. Could you please tell me how can I read error object to sure the error (Error instance) is the relevant SSL Error? I mentioned Info.plist way of doing specifically because I would not be adding .pem or .cer file as a configuration item in the app code. Appreciate your response.

Solved in latest beta 8.