You plan to deploy 20 Client Access servers that will have Exchange Server 2013 installed.
You need to prepare the certificate required for the planned deployment. The solution must ensure
that the same certificate can be used on all of the Client Access servers.
What should you do first?

A.
On each Client Access server, start the Certificates console and run the Certificate Import Wizard.

B.
From the Exchange Admin Center, create a new certificate request.

C.
On all of the Client Access servers, run the Get-ExchangeCertificate cmdlet.

D.
On one of the Client Access servers, run the New-ExchangeCertificate cmdlet and and specify the
binaryencoded parameter.

Explanation:
Configuring server certificates
In Exchange 2013, you can use the Certificate Wizard to request a digital certificate from a
certification authority. After you’ve requested a digital certificate, you’ll need to install it on the
Client Access server.Reference:
Exchange 2013 Client Access server configuration
https://technet.microsoft.com/en-us/library/hh529912(v=exchg.150).aspx