You have a Microsoft Exchange Server 2019 organization. You purchase a Microsoft 365 subscription and configure Active Directory synchronization. You use a smart host for all communication between the organization and the Internet. The smart host performs email hygiene and alters message headers. You plan to run the Hybrid Configuration wizard to create an Exchange hybrid deployment and change the MX record to point to Exchange Online. You need to decommission the smart host from the organization. What should you do first?

A. Modify the InternalSmtpServer value by running the Set-TransportConfig cmdlet.
B. Modify the Send connector to use DNS delivery.
C. Modify the TLSReceiveDomainSecureList value by running the Set-TransportConfig cmdlet.
D. Create a Receive connector that allows anonymous authentication.

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