You deploy Layer 7 load balancers to the New York and London offices.
You are planning the namespace configuration that will be used once you complete the planned upgrade to Exchange Server 2016.
You need to recommend a solution to meet the connectivity requirements for the namespaces.
What should you recommend?
A. On the New York office servers, change the internal URLs to mail.fabrikam.com.
B. On all of the branch office servers, change the external URLs to $null.
C. On all of the branch office servers, change the external URLs to mail.fabrikam.com.
D. On the New York office servers, change the internal URLs to $null.
