Administrators have the ability to hide a user’s contact information from the rest of the domain even if contact sharing is enabled. This was previously only available using the administrator control panel.

This can now be done programmatically via the Google Apps Profiles API.

Editions included:
Google Apps, Google Apps for Business, Government and Education

For more information:
http://googleappsdeveloper.blogspot.com/2011/08/unshare-domain-users-contact.html
http://code.google.com/googleapps/domain/profiles/developers_guide.html

New look on the way for Gmail, Calendar, Docs and Sites! Find out more at whatsnew.googleapps.com/new-look

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