I have for days been trying to get contact sharing to work in an Apps free version to no avail.
Under Settings > Contacts, "Contact sharing" is turned on with "Show all email addresses" also turned on.
And of course under "Organization and Users", "Services", "Contacts" is on (Green).
According to the Google description this should simply work, but on the other hand I have noticed from other treads that some third-party providers are selling plugins to enable this functionality. But can it really be true that Google has disabled this service and do not mention it with one word in their documentation?