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?