Cross-Farm Site Permissions
Use the cross-farm site permissions feature to allow internal SharePoint applications to access websites across farms.
SharePoint 2013
Feature Details
a5aedf1a-12e5-46b4-8348-544386d5312d
Site
False
True
False
C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\15\Template\Features\CrossFarmSitePermissions
Microsoft.SharePoint.Portal.CrossFarmSitePermissionsFeatureReceiver, Microsoft.SharePoint.Portal, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c