Explanation/Reference:
Explanation:
The Baltimore and Chicago offices have independent Internet connections. Internet connectivity for the Los Angeles office is provided through Chicago.
Currently there are no mail servers in Chicago, only in Baltimore and Los Angeles.
Once the transition to Exchange Server 2013 in the Chicago office is complete, all mail flow to and from the Internet will be managed centrally through that office by using a Send connector that has the following configurations:
Connector name: CH-to-Internet

Address space *

Source servers: CH-EX2, CH-EX3

Cost: 10

When you deploy Exchange 2013, outbound mail flow cannot occur until you configure a Send connector to route outbound mail to the Internet.
Thus, we need to disable the send connector from Chicago to the internet so that when a new send connector on the Baltimore server is created, email can be sent to the internet.