Your company has a main office and a branch office. The main office is located in Amsterdam. The branch office is located in New York. Each office has a data center. The offices connect to each other by using a high-bandwidth, low-latency WAN link. You have a Lync Server 2013 infrastructure that contains 5,000 users.
You plan to deploy a persistent chat infrastructure.
You need to ensure that persistent chat rooms remain available if a Persistent Chat Server fails.
What should you do?
A. Create one Persistent Chat Server pool that contains two active chat servers.
B. Create two Persistent Chat Server pools that each contains one active chat server and one standby chat server.
C. Create two Persistent Chat Server pools that each contains one active chat server.
D. Create one Persistent Chat Server pool that contains one active chat server and one standby chat server.
