Which three actions should you perform?

You have a Microsoft Exchange Server 2019 organization named contoso.com.

You need to ensure that all email sent between contoso.com and an Exchange organization named litwareinc.com is protected by using TLS encryption.

Which three actions should you perform? Each correct answer presents part of the solution. NOTE: Each correct selection is worth one point.
A . Configure all Send connectors to use smart hosts.
B . Run the Set-TransportConfig cmdlet.
C . Create and issue new self-signed certificates for each Mailbox server
D . Run the Set-ReceiveConnector CAuthMechanism BasicAuthRequireTLS command.
E . Assign a certificate from a public certification authority (CA) to each Mailbox server.
F . Run the Set-ReceiveConnector CAuthMechanism TLS command.

Answer: B,E,F