You have an Exchange Server 2013 organization named Contoso. The organization contains a server
named Server1 that has Exchange Server 2013 installed. Server1 has the Mailbox server role and the
Client Access server role installed.
Server1 has a Send connector for a partner company. The Send connector is configured for Domain
Security with a domain named adatum.com.
The only certificate installed on Server1 expires.
You discover that all email messages sent to adatum.com remain in the queue on Server1.
On Server1, you install a new certificate from a trusted third-party.
You need to ensure that the email messages are delivered to adatum.com.
What should you do?

A.
Assign the new certificate to the IIS service.

B.
Send the new certificate to the administrator at adatum.com.

C.
Assign the new certificate to the SMTP service.

D.
Create a new send connector that contains an address space to adatum.com.