I've ended up in the infuriating situation where some* of the users in my G Suite (formerly Google Apps Free edition) cannot access their contacts through the web browser. If they go to Gmail, then click Contacts from the drop down it displays this error page:
We are sorry, but you do not have access to Contacts. Please log in to admin.google.com to enable Contacts
Google provide a help link that takes me to Control who can access Google services help page. If I click the Contacts link it takes me to a page called Manage the Directory service which provides NO clues at all about how to enable Contacts.
Many of the help docs mention navigating to App > G Suite > Contacts. Unfortunately the Contacts app appears nowhere in the list of G Suite apps (it says I have eight apps: Calendar, Drive, Gmail, Hangouts, Google+, Keep, Sites, Directory). Contacts shows up nowhere in either "G Suite" or "Additional Google services" app settings.
How can I get Contacts working again?
* I just noticed that my admin account can access contacts via the browser. Just none of my other users. Cannot see anything configured differently for that account.