You are managing a SharePoint farm in an Active Directory Domain Services (AD DS) forest.
The forest contains two domains named americas.contoso.com and europe.contoso.com. A single
SharePoint farm is located in the americas.contoso.com domain and uses Kerberos authentication.
Users in the europe.contoso.com domain cannot access the Excel Services application in the
americas.contoso.com domain when using an external data source.
You need to ensure that users in the europe.contoso.com domain can use the Excel Services
application with external data sources.
What should you do?
A.
Deploy a SharePoint farm in the europe.contoso.com domain.
B.
Configure Kerberos constrained delegation.
C.
Configure basic Kerberos delegation.
D.
Configure anonymous access in the SharePoint farm.
I agree
Agreed:
Excel Services accesses external data sources by using a delegated Windows identity. Consequently, external data sources must reside within the same domain as the SharePoint Server 2010 farm or Excel Services must be configured to use the Secure Store Service. If the Secure Store Service is not used and external data sources do not reside within the same domain, authentication to the external data sources will fail.
https://technet.microsoft.com/en-us/library/ff604007(v=office.14).aspx#section3
C
B
I think it is B.