When the company you work at is using 2-factor login and your Company Admin has set up that you should use it - you need to do the following.
Make sure you have installed the Google Authenticator app on your phone - it can be downloaded from appStore or Google Play
First time you login after 2-factor login has been enable you will see this screen
Scan the QR code with the Google Authenticator app.
Type in the code the Google Authenticator app gives you.
Click on Activate.
You are now logged in to Delogue.
The next time you login to Delogue - you will see the following
Open your Google Authenticator app and type in the code it provides.
Click on Login.
And you are now logged in to Delogue.
WHAT DO I DO IF I GET A NEW PHONE?
In case you get a new phone - you have to install the Google Authenticator app on this phone.
Contact your Company Admin and get him to Regenerate the QR code.
Once that is done - you can follow the steps mentioned above.