Retain Google Apps
From GWAVA Technologies Training
The Google Apps module allows Retain to archive Gmail data items from Gmail. To configure Retain for Gmail archiving, Retain needs Gmail to be configured to allow Retain access, and the appropriate information entered into Retain.
The Google Apps API has changed since the time that the Google Apps module was developed. Thus, Retain 3.5 and earlier used the old API. Retain 3.5.1 and later is using the new API. As of April 20, 2015, the old API is being discontinued by Google, thus requiring an upgrade to Retain 3.5.1 or later.
Here is a KB article with all of the instructions: Retain 3.5.1 and the Changes to the Google Apps API
