We just got Google Apps for business and want to give users a step-by-step document how to install the extension and to login....
There is no written instructions but it is fairly simple.
1. Head to this URL (https://chrome.google.com/webstore/detail/todoist-to-do-list-and-ta/jldhpllghnbhlbpcmnajkpdmadaolakh?hl=en)
2. Click on the Free + button.
3. Todoist will get installed, and a button will appear at the top right, beside your URL bar.
4. Click the TD button mentioned above, enter credentials into the corresponding boxes.