PC Recipe How to Use Microsoft Authenticator
The way to use Microsoft Authenticator. You might be confused at the first step, the importing account. Either confused to backup. This is one solution.
authenticator
PC Recipe 
PC Recipe How to use Google Authenticator
Do you use Authenticator intuitively? Here I will tell you how to use Google Authenticator.
Advance Preparation 3. Installing Authenticator
For setting 2FA, Install Authenticator to your mobile. It would be better to use either Microsoft Authenticator or Google Authenticator.