HOTSPOT
You have an Exchange Server organization that contains four servers. The servers are configured as
shown in the following table.
SiteA contains an IP gateway that uses a dial plan named Dialplan1. SiteB contains a Lync Server
2013 server that uses a dial plan named Dialplan2. You plan to migrate all Unified Messaging (UM)
functionalities to Exchange Server 2013.
You need to identify which tasks must be performed to complete the migration. Which tasks should
you identify? (To answer, select the tasks that are required and not required in the answer area.)
Answer: 
So I am guessing the only servers in the dial plan will be the servers in the same site as the lync server (or other phone system)