You deploy Lync Online for a company that has offices in San Francisco and New York. The two offices both
connect to the Internet. There is no private network link between the offices.
Users in the New York office report that they cannot transfer files to the users in the San Francisco office by
using Skype for Business Online.
You need to ensure that users in both offices can transfer files by using Skype for Business Online.
What should you do?

A.
Configure the firewall to open Transmission Control Protocol (TCP) ports 50060-50079.

B.
Configure the firewall to open Transmission Control Protocol (TCP) ports 50040-50059.

C.
Create a private network connection to share files.

D.
Upgrade all of the Skype for Business Online clients to use Skype for Business client application.

Explanation:
B: Lync Online will allow for file sharing if the firewall is configured accordingly since it is mentioned that Lync
Online is already deployed. And there is connectivity by both offices to the Internet. If the TCP port number
50040-50059 is configured open on the firewall you will be able to share Audio, Video and application as well as
Desktop sharing content and files.