How to Exchange trust certificates between farms in SharePoint 2010

In this article we are going to see how to Exchange trust certificates between farms in SharePoint 2010. 

In Microsoft SharePoint server 2010 a new feature Service Applications has been introduced. In MOSS 2007 we had SSP which cannot be shared across farm levels, which has been replaced by Service Applications in Microsoft SharePoint Server 2010. A SharePoint farm can connect to and consume a service application that is published on another SharePoint Server 2010 farm. For this to occur, the farms must exchange trust certificates. You must use Windows Power Shell 2.0 commands to export and copy the certificates between farms. After the certificates are exported and copied, you can use either Windows Power Shell 2.0 commands or Central Administ