A company has two SharePoint 2013 farms. Farm1 is used as an enterprise shared services provider.
Farm2 consumes Farm1 while providing team sites for collaboration.
You need to configure trust between Farm1 and Farm2.
Which action should you perform?

A.
Use Windows PowerShell to upload Farm2 certificates to the Central administration site.

B.
Create and export certificates from Farm2. Deploy the exported certificates to Farm1 by using Group
Policy.

C.
Create and export certificates from Farm2. Open the Internet Information Services (IIS) console on
Farm1 and add the exported certificates to the Certificates section.

D.
Create and export certificates from Farm2. Copy and import the exported certificates on Farm1 by
using Windows PowerShell.

Explanation:
In SharePoint 2013, a SharePoint farm can connect to and consume a service application that is
published on another SharePoint 2013 farm. For this to occur, the farms must exchange trust
certificates.
You must use Windows PowerShell 3.0 commands to export and copy the certificates between farms.
After the certificates are exported and copied, you can use either Windows PowerShell 3.0 commands
or Central Administration to manage the trusts within the farm.
Incorrect answers:Not A: You do not upload.
Not B: A GPO is not used.
Not C: IIS is not used. Exchange trust certificates between farms in SharePoint 2013
https://technet.microsoft.com/en-us/library/ee704552.aspx