Your company has offices in Tokyo, Bangkok, and Shanghai.
All connections to the Internet are routed through an Internet connection in the Tokyo office. All of the offices connect to each other by using a WAN link.
The network contains 10 servers that have Exchange Server 2010 installed. The servers are configured as shown in the following table.

You plan to deploy 10 servers that will have Exchange Server 2013 installed.
The servers will be configured as shown in the following table.

Each site has an IP-PBX that provides telephony services for the mailboxes in that site by using unsecured SIP over TCP 5070. The IP-PBX uses the same port to connect to multiple SIP peers.
You need to recommend which tasks must be performed to ensure that the Unified Messaging (UM) features are available to the mailboxes if a single server fails.
Which three actions should you include in the recommendation? (Each correct answer presents part of the solution. Choose three.)