Single Sign On - Implemented with Google Apps
Step 1: Download Google Apps Engine SDK
This can be found at https://developers.google.com/appengine/
Step 2: Enable the App Engine in your Google Apps admin.
Step 3: Go to the Google Apps Engine admin.
This can be found at https://appengine.google.com/
Step 4: Then you'll add a link from your Intranet Google Site or custom navigation within your google apps enterprise UI to: http://auth.leadingre.com/googleuser.aspx. There is a data sharing acceptance screen the users will see upon initial login only, after which they'll be dropped into the Access or Institute page of your choice.
Step 5: LeadingRE will add your domain name to our company configuration so any Google+ SSO requests by users @yourdomain.com are matched to your company, created based on some of their basic profile information, and allow login.