Sharing SharePoint 2010/ 2013 Service Applications across Farms

We can share/Publish-consume a Service Application across different farms like User Profile Service Application on Production can be shared to DEV, QA and UAT farms which will save duplication.

Below is the Technet Link and more steps how the Service Application can be shared across farms.

http://technet.microsoft.com/en-us/library/ff621100(v=office.14).aspx


1.Exchange trust certificates between the farms
http://technet.microsoft.com/en-us/library/ee704552(v=office.14).aspx
2.On the publishing farm, publish the service application.
3.On the consuming farm, set the permission to the appropriate service applications
4.On the consuming farm, connect to the remote service application
5.Add the shared service application to a Web application proxy group on the consuming farm