Exchange Hybrid Centralized Mailflow – Yes or No
Centralized Mail Flow (also known as Centralized Mail Transport, CMT) is an option in Exchange hybrid environments whereby all outgoing Internet messages from mailboxes in Exchange Online are first routed through the local Exchange organization before being delivered to the Internet. Similarly, depending on the MX strategy, incoming Internet messages can first pass through the local environment before being delivered to cloud mailboxes. The goal is usually to continue applying central compliance, DLP, encryption, journaling, or gateway functions in the local infrastructure. As a rule, CMT is configured as part of the hybrid configuration using the Hybrid Configuration Wizard (HCW).
