Before you can start using Google Contacts Integration, you need to authenticate your CMS program and give it access to your account.
It is very important that CMS Connected remains running in the System Tray. CMS Connected continues to silently and automatically renew your account without your involvement. This occurs every 5 minutes.
If CMS Connected is not running and the authentication expires, the Google Contact integration will stop working. Should this occur, you will be prompted with a message from CMS prior to attempting to access your Google Contacts.
To correct this issue, simply start CMS Connected and Login. To expedite the renewal of the authentication, click Google Contact Updates from the Dashboard or CMS Connected menu . Expired authentications don't have to be authenticated anew online unless they were also revoked.
The next step is Setting up a Google Group.