I set up a clean Windows Server 2012 R2 machine as a Domain Controller with a fixed IP on my network. I used this checklist to configure my VPN: http://www.thomasmaurer.ch/2014/01/how-to-install-vpn-on-windows-server-2012-r2/
. Testing the VPN connection using Windows Domain I had no issues.
Then I installed Azure Multi Factor authentication, and set up my RADIUS configuration using the following checklist: https://azure.microsoft.com/en-us/documentation/articles/multi-factor-authentication-get-started-server-radius/
. On my server, I opened Routing and Remote Access and set the Security authentication provider as "RADIUS" and configured accordingly.
Now, when I try to VPN to my server, I get an error 812 "812: The connection was prevented because of a policy configured on your RAS/VPN server. Specifically, the authentication method used by the server to verify your username and password may not match the authentication method configured in your connection profile. Please contact the Administrator of the RAS server and notify them of this error.". I've tried numerous checklists online and could not find a solution. The event viewer doesn't provide much information either besides giving me the name of the user attempting to connect.
On the connecting client, under VPN properties, Security, I tried setting "allow these protocols" and "MS Chap v2". I also tried selecting PPTP as the VPN type rather than automatic. Still the same issue occurs.
I appreciate your help.