Wasted a lot of time today trying to get Azure P2S VPN setup on my MacBook Air. I had done the hard work while setting it up for Windows – setup an internal CA, generate client certificates, etc. – and it was working fine with Windows 10 but kept disconnecting with Mac OS. The instructions were straight-forward but the client would connect and disconnect with no messages. Couldn’t find a way to enable logging either!
The issue was very similar to the one in this StackExchange post but it couldn’t be about certificates as in that post as I had setup mine correctly. I too was getting the same error message as that poster in both wifi.log and syslog.
I poked around the authentication settings and finally hit upon a fix. Instead of setting “Authentication Settings” to certificate, as in the instructions, I set it to “None” and that gave me two options as in the screenshot below. I selected “Certificate” here and pointed it to a copy of the user certificate I had on file and that did the trick!
No idea why this is different to the official instructions.