How to login Multi-Factor Authentication to Dynamics 365 using C#

Question

Multi-factor authentication is enabled on the Azure portal, and it will send a OTP whenever I log in to Dynamics 365. I want to login with MFA in a C# console application.

Answer 1

You can use an App Password for your C# console application.

1. Login to Office Portal. Click on gear in upper right, click Office 365 under "Your App Settings."
2. Click on Security & Privacy on left and then Additional Security Verification.
3. Click Create and manage app passwords.
4. Click Create and give your password a name (maybe the name of your C# application so you remember it later).
5. Copy the generated password (it will never be shown again).
6. Use your normal username and this new password - it will skip multi-factor authentication.

You can create as many App Passwords as you need for legacy apps that don't work with MFA. Try not to reuse them - just create as many as you need. This way you can easily go back and revoke specific passwords when you don't need them any more.