Google Search Appliance Connectors Administration Guide - Manual (Page 9)

SAML security messages
In this release, SAML is the communication protocol between the search appliance and the
connector for user authentication and authorization. This protocol replaces XML, which
was used in previous releases.
Simplified troubleshooting
A strength of Connectors 4.0 is simplified troubleshooting. If you encounter issues, you
have several options for troubleshooting them, including the Connector Dashboard, as well
as index and real-time diagnostics on the search appliance, and logs on the connector
machine. For detailed information, see
Troubleshoot Connectors .
Giving all users access to all documents
Connectors 4.0.3 introduces the capability of giving all users access to all documents. For
information about this capability, see
Mark all documents as public .
Saving feeds sent to the GSA
Connectors 4.0.3 introduces the capability of archiving all feeds sent to the GSA on the local
drive. For more information, see
Archive feeds .