Auth Application

The Authentication section is where you can set domain Oauth access for gPanel. Certain features require Google's OAuth in order to access the data. Be sure that the user setting the domain OAuth is a Super Admin in your Google Apps environment. 

Begin by clicking Set Domain Oauth Access.

Next, you will see the specific data access you are granting to gPanel for your domain.  
Review and then click Accept.

Note: For more information on a particular feature, click the info button on the right.

The next screen will display in bold who is the authorized administrator.  To re-authenticate with a 
different administrator, click Re-Authenticate.