This is a MediaWiki extension that adds Google Apps authentication and a php library that allows authentication with Google Apps. I have fixed a small issue that prevented this from working immediately. Many thanks to: Bertrand Gorge for creating the plugin, and Constantin Bosneaga for creating the php OpenID library. See below links for more info - http://www.mediawiki.org/wiki/Extension:GoogleAppsAuthentification http://a32.me/2011/03/google-apps-as-single-authentication-point-for-your-corporate-applications/ Instructions: 1. Copy all files in this directory into <media wiki root directory>/extensions/GoogleAppsAuthentication 2. Add the below code to the bottom of LocalSettings.php in root MediaWiki installation directory, filling in the name of your domain: # ============ Google Apps Authentication =========== # Make sure nobody can see/edit anything if not logged in: $wgGroupPermissions['*']['edit'] = false; $wgGroupPermissions['*']['read'] = false; # Make sure everybody can see/edit everything if logged in: $wgGroupPermissions['user']['read'] = true; $wgGroupPermissions['user']['edit'] = true; # Tell the extension who should log in (change yourdomain.com): $wgDefaultUserOptions['GoogleAppsDomain'] = 'addyourdomainhere.com'; require_once("$IP/extensions/GoogleAppsAuthentication/GoogleAppsAuthentication.php");