I have the assignment to implement two-factor authentication on Windows Server. I want a user to receive a passcode on his mobile phone to successfully log in.
A user will initiate a remote desktop connection and enter his domain credentials. After punching-in credentials, the system will ask for 4 digit passcode. The user will receive his passcode on his mobile and punch-in that on server screen.
In Windows, is there a way to get the notification on Window or Web Service to send a passcode? or is there any free open-source utility available to achieve it?