- In your Google Admin console (at admin.google.com)…
- Go to Users.
- Click the user you want in the list.
- Click Security.
- Click 2-step verification.
- Click Get Backup Verification Codes.
- Copy one of the verification codes.
- Click Done.
- Send the backup code to the user in an IM or text message.
The user can sign in to their account using a password and the backup code.