Android - FAQ Support Center

Can’t setup Nine with G Suite account. How do I set up my G Suite account?

In case you are a G Suite (Google Apps) user, you can set up your account on Nine.

When you are using the two-step verification, Google provides you with the app-specific password. Please see the following link in more detail.

Therefore, you can generate the app-specific password with the following link and then use it while setting up your account on Nine as well.